diff --git a/.changelog/4359.yml b/.changelog/4359.yml
new file mode 100644
index 00000000000..0d91a514748
--- /dev/null
+++ b/.changelog/4359.yml
@@ -0,0 +1,4 @@
+changes:
+- description: Moved PB108 to the new validate format. The validate checks that the 'taskid' and the 'id' under the 'task' field are from UUID format.
+  type: internal
+pr_number: 4359
diff --git a/demisto_sdk/commands/validate/sdk_validation_config.toml b/demisto_sdk/commands/validate/sdk_validation_config.toml
index 7db20a08e59..a0cbf2f95ba 100644
--- a/demisto_sdk/commands/validate/sdk_validation_config.toml
+++ b/demisto_sdk/commands/validate/sdk_validation_config.toml
@@ -29,7 +29,7 @@ select = [
     "IN100", "IN101", "IN102", "IN104", "IN106", "IN107", "IN108", "IN109", "IN110", "IN112", "IN113", "IN114", "IN115", "IN117", "IN118", "IN121", "IN122", "IN123", "IN124", "IN125", "IN126", "IN127", "IN130",
     "IN131", "IN134", "IN135", "IN139", "IN141", "IN142", "IN144", "IN145", "IN146", "IN149", "IN150", "IN151", "IN152", "IN153", "IN154", "IN156", "IN158", "IN159", "IN160",
     "IN161", "IN162",
-    "PB100", "PB101","PB103","PB104", "PB105", "PB118", "PB123", "PB126",
+    "PB100", "PB101","PB103","PB104", "PB105","PB108", "PB118", "PB123", "PB126",
     "DO100", "DO101", "DO102", "DO103", "DO104", "DO105", "DO106",
     "DS100", "DS101", "DS105", "DS106", "DS107",
     "SC100", "SC105", "SC106", "SC109",
@@ -52,7 +52,7 @@ select = [
     "IN131", "IN134", "IN135", "IN139", "IN141", "IN142", "IN144", "IN145", "IN146", "IN149", "IN150", "IN151", "IN152", "IN153", "IN154", "IN156", "IN158", "IN159", "IN160",
     "IN161", "IN162",
     "LO107",
-    "PB100", "PB101","PB103","PB104", "PB105", "PB123", "PB126",
+    "PB100", "PB101","PB103","PB104", "PB105","PB108", "PB123", "PB126",
     "BA100", "BA101", "BA105", "BA106", "BA110", "BA111", "BA113", "BA116", "BA118", "BA119", "BA126",
     "DS100", "DS101", "DS105",
     "PA100", "PA101", "PA102", "PA103", "PA104", "PA105", "PA107", "PA108", "PA109", "PA111", "PA113", "PA115", "PA117", "PA118", "PA119", "PA120",
diff --git a/demisto_sdk/commands/validate/tests/PB_validators_test.py b/demisto_sdk/commands/validate/tests/PB_validators_test.py
index 9640d34d034..0ec6d5df4e6 100644
--- a/demisto_sdk/commands/validate/tests/PB_validators_test.py
+++ b/demisto_sdk/commands/validate/tests/PB_validators_test.py
@@ -18,6 +18,9 @@
 from demisto_sdk.commands.validate.validators.PB_validators.PB105_playbook_delete_context_all import (
     PlaybookDeleteContextAllValidator,
 )
+from demisto_sdk.commands.validate.validators.PB_validators.PB108_is_valid_task_id import (
+    IsValidTaskIdValidator,
+)
 from demisto_sdk.commands.validate.validators.PB_validators.PB118_is_input_key_not_in_tasks import (
     IsInputKeyNotInTasksValidator,
 )
@@ -232,6 +235,61 @@ def test_IsAskConditionHasUnhandledReplyOptionsValidator():
     assert IsAskConditionHasUnhandledReplyOptionsValidator().is_valid([playbook])
 
 
+def create_invalid_playbook(field: str):
+    """Create an invalid playbook that has an invalid taskid or the 'id' under the 'task' field is invalid
+    Args:
+        - field str: which field to update taskid or task.id.
+    Return:
+        - a playbook object
+    """
+    playbook = create_playbook_object()
+    tasks = playbook.tasks
+    for task_id in tasks:
+        task_obj = tasks[task_id]
+        if field == "taskid":
+            task_obj.taskid = task_obj.taskid + "1234"
+        else:
+            task_obj.task.id = task_obj.task.id + "1234"
+        break
+    return playbook
+
+
+def test_IsValidTaskIdValidator(playbook):
+    """
+    Given:
+    - A playbook
+        Case 1: The playbook is valid.
+        Case 2: The playbook isn't valid, it has invalid taskid.
+        Case 3: The playbook isn't valid, the 'id' under the 'task' field is invalid.
+
+    When:
+    - calling IsValidTaskIdValidator.is_valid.
+
+    Then:
+    - The results should be as expected:
+        Case 1: The playbook is valid
+        Case 2: The playbook is invalid
+        Case 3: The playbook is invalid
+    """
+    # Case 1
+    playbook_valid = create_playbook_object()
+    results_valid = IsValidTaskIdValidator().is_valid([playbook_valid])
+
+    # Case 2
+    playbook_invalid_taskid = create_invalid_playbook("taskid")
+    results_invalid_taskid = IsValidTaskIdValidator().is_valid(
+        [playbook_invalid_taskid]
+    )
+
+    # Case 3
+    playbook_invalid_id = create_invalid_playbook("id")
+    results_invalid_id = IsValidTaskIdValidator().is_valid([playbook_invalid_id])
+
+    assert not results_valid
+    assert results_invalid_taskid
+    assert results_invalid_id
+
+
 def test_PlaybookDeleteContextAllValidator():
     """
     Given:
diff --git a/demisto_sdk/commands/validate/validators/PB_validators/PB108_is_valid_task_id.py b/demisto_sdk/commands/validate/validators/PB_validators/PB108_is_valid_task_id.py
new file mode 100644
index 00000000000..35e73f6d9c4
--- /dev/null
+++ b/demisto_sdk/commands/validate/validators/PB_validators/PB108_is_valid_task_id.py
@@ -0,0 +1,70 @@
+from __future__ import annotations
+
+from typing import Iterable, List
+
+from demisto_sdk.commands.common.tools import is_string_uuid
+from demisto_sdk.commands.content_graph.objects.base_playbook import TaskConfig
+from demisto_sdk.commands.content_graph.objects.playbook import Playbook
+from demisto_sdk.commands.validate.validators.base_validator import (
+    BaseValidator,
+    ValidationResult,
+)
+
+ContentTypes = Playbook
+
+
+class IsValidTaskIdValidator(BaseValidator[ContentTypes]):
+    error_code = "PB108"
+    description = "Validate that the task ID and the 'id' under the 'task' field are from UUID format."
+    rationale = "Each task should have a unique id in UUID format to avoid unknown behavior and breaking the playbook."
+    error_message = "This playbook has tasks with invalid 'taskid' or invalid 'id' under the 'task' field.\n{0}"
+    related_field = "taskid"
+    is_auto_fixable = False
+
+    def is_valid(self, content_items: Iterable[ContentTypes]) -> List[ValidationResult]:
+        """Check whether all playbook tasks has valid taskid and the 'id' under the 'task' field is valid as well.
+        Args:
+            - content_items (Iterable[ContentTypes]): The content items to check.
+        Return:
+            - List[ValidationResult]. List of ValidationResults objects.
+        """
+        results: List[ValidationResult] = []
+        for content_item in content_items:
+            invalid_tasks = self.invalid_tasks(content_item.tasks)
+            tasks_error_message = ""
+            for task_id in invalid_tasks:
+                tasks_error_message = (
+                    f"{tasks_error_message}Task {task_id} has invalid UUIDs in the fields "
+                    f"{invalid_tasks[task_id]}.\n"
+                )
+            if invalid_tasks:
+                results.append(
+                    ValidationResult(
+                        validator=self,
+                        message=self.error_message.format(tasks_error_message),
+                        content_object=content_item,
+                    )
+                )
+        return results
+
+    def invalid_tasks(self, tasks: dict[str, TaskConfig]) -> dict[str, list]:
+        """Check which tasks has invalid taskid or the 'id' under the 'task' field is invalid
+        Args:
+            - tasks dict[str, TaskConfig]: The playbook tasks.
+        Return:
+            - dict[str, TaskConfig] that contains the invalid tasks.
+        """
+        invalid_tasks = {}
+        for task_id, task in tasks.items():
+            taskid = task.taskid
+            inner_id = task.task.id
+            is_valid_taskid = is_string_uuid(taskid)
+            is_valid_inner_id = is_string_uuid(inner_id)
+            invalid_fields = []
+            if not is_valid_taskid:
+                invalid_fields.append("taskid")
+            if not is_valid_inner_id:
+                invalid_fields.append("the 'id' under the 'task' field")
+            if invalid_fields:
+                invalid_tasks[task_id] = invalid_fields
+        return invalid_tasks