diff --git a/cmd/bigquery-emulator/main.go b/cmd/bigquery-emulator/main.go
index 0effb880f..c52433852 100644
--- a/cmd/bigquery-emulator/main.go
+++ b/cmd/bigquery-emulator/main.go
@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 
 	"github.com/goccy/bigquery-emulator/server"
@@ -16,7 +17,8 @@ import (
 
 type option struct {
 	Project      string           `description:"specify the project name" long:"project"`
-	Dataset      string           `description:"specify the dataset name" long:"dataset"`
+	Dataset      string           `description:"specify the dataset name [DEPRECATED]" long:"dataset"`
+	Datasets     string           `description:"specify dataset names, separated by a comma" long:"datasets"`
 	HTTPPort     uint16           `description:"specify the http port number. this port used by bigquery api" long:"port" default:"9050"`
 	GRPCPort     uint16           `description:"specify the grpc port number. this port used by bigquery storage api" long:"grpc-port" default:"9060"`
 	LogLevel     server.LogLevel  `description:"specify the log level (debug/info/warn/error)" long:"log-level" default:"error"`
@@ -85,8 +87,13 @@ func runServer(args []string, opt option) error {
 	}
 	project := types.NewProject(opt.Project)
 	if opt.Dataset != "" {
+		fmt.Println("DeprecationWarning: the flag --dataset is deprecated. use the flag --datasets instead")
 		project.Datasets = append(project.Datasets, types.NewDataset(opt.Dataset))
 	}
+
+	for _, dataset := range strings.Split(opt.Datasets, ",") {
+		project.Datasets = append(project.Datasets, types.NewDataset(dataset))
+	}
 	bqServer, err := server.New(db)
 	if err != nil {
 		return err