diff --git a/docs/resources/vserver_server.md b/docs/resources/vserver_server.md
index 00ec8c6..a26c5f5 100644
--- a/docs/resources/vserver_server.md
+++ b/docs/resources/vserver_server.md
@@ -53,7 +53,7 @@ The following arguments are supported:
 - **ssh_key** (String, Optional) ID of SSH key
 - **user_name** (String, Optional) Name of user
 - **user_password** (String, Optional) Password of user
-- **server_group** (String, Optional) ID of Server Group.
+- **server_group_id** (String, Optional) ID of Server Group.
 - **user_data** (String, Optional) User data to provide when launching the server.
 - **user_data_base64_encode** (Boolean, Optional) Can be used instead of user_data to pass base64-encoded binary data directly. Use this instead of user_data whenever the value is not a valid UTF-8 string.
   
diff --git a/resource/vserver/resource_acttach_volume.go b/resource/vserver/resource_acttach_volume.go
index a5af497..8e5c663 100644
--- a/resource/vserver/resource_acttach_volume.go
+++ b/resource/vserver/resource_acttach_volume.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"strings"
 	"time"
 
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
@@ -18,6 +19,9 @@ func ResourceAttachVolume() *schema.Resource {
 		Create: resourceVolumeAttach,
 		Delete: resourceVolumeDetach,
 		Read:   resourceVolumeRead,
+		Importer: &schema.ResourceImporter{
+			StateContext: resourceAttachVolumeImport,
+		},
 		Schema: map[string]*schema.Schema{
 			"project_id": {
 				Type:     schema.TypeString,
@@ -39,6 +43,62 @@ func ResourceAttachVolume() *schema.Resource {
 		},
 	}
 }
+
+func resourceAttachVolumeImport(ctx context.Context, d *schema.ResourceData, m interface{}) ([]*schema.ResourceData, error) {
+	idParts := strings.Split(d.Id(), ":")
+	if len(idParts) != 3 || idParts[0] == "" || idParts[1] == "" || idParts[2] == "" {
+		return nil, fmt.Errorf("Unexpected format of ID (%q), expected ProjectID:VolumeID:ServerID", d.Id())
+	}
+	projectID := idParts[0]
+	volumeID := idParts[1]
+	cli := m.(*client.Client)
+	resp, httpResponse, _ := cli.VserverClient.VolumeRestControllerApi.GetVolumeUsingGET2(context.TODO(), projectID, volumeID)
+	if CheckErrorResponse(httpResponse) {
+		responseBody := GetResponseBody(httpResponse)
+		err := fmt.Errorf("Get Volume fail with errMsg : %s", responseBody)
+		return nil, err
+	}
+	respJSON, _ := json.Marshal(resp)
+	log.Printf("-------------------------------------\n")
+	log.Printf("%s\n", string(respJSON))
+	log.Printf("-------------------------------------\n")
+	volume := resp.Data
+	if volume.Status != "IN-USE" {
+		err := fmt.Errorf("Volume status %s unexpected (IN-USE)", volume.Status)
+		return nil, err
+	}
+	serverID := idParts[2]
+	_, httpResponse, _ = cli.VserverClient.ServerRestControllerApi.GetServerUsingGET1(context.TODO(), projectID, serverID)
+	if CheckErrorResponse(httpResponse) {
+		responseBody := GetResponseBody(httpResponse)
+		err := fmt.Errorf("Get Server fail with errMsg : %s", responseBody)
+		return nil, err
+	}
+	if volume.MultiAttach {
+		if !contains(volume.ServerIdList, serverID) {
+			err := fmt.Errorf("Server is not attached in this volume")
+			return nil, err
+		}
+	} else if volume.ServerId != serverID {
+		err := fmt.Errorf("Server is not attached in this volume")
+		return nil, err
+	}
+	d.SetId(volumeID)
+	d.Set("project_id", projectID)
+	d.Set("server_id", serverID)
+	d.Set("volume_id", volumeID)
+	return []*schema.ResourceData{d}, nil
+}
+
+func contains(list []string, target string) bool {
+	for _, item := range list {
+		if item == target {
+			return true
+		}
+	}
+	return false
+}
+
 func resourceVolumeAttach(d *schema.ResourceData, m interface{}) error {
 	projectID := d.Get("project_id").(string)
 	volumeID := d.Get("volume_id").(string)
diff --git a/resource/vserver/resource_server.go b/resource/vserver/resource_server.go
index ed582d9..02b6935 100644
--- a/resource/vserver/resource_server.go
+++ b/resource/vserver/resource_server.go
@@ -278,7 +278,6 @@ func resourceServerRead(d *schema.ResourceData, m interface{}) error {
 	d.Set("ssh_key_name", server.SshKeyName)
 	d.Set("server_group_id", server.ServerGroupId)
 	d.Set("root_disk_id", server.BootVolumeId)
-	d.Set("image_id", server.Image.Id)
 	d.Set("os_licence", server.Licence)
 	_, ok := d.GetOk("host_group_id")
 	if ok {
@@ -366,6 +365,7 @@ func resourceServerImport(ctx context.Context, d *schema.ResourceData, m interfa
 		d.Set("network_id", "")
 		d.Set("subnet_id", "")
 	}
+	d.Set("image_id", serverResp.Data.Image.Id)
 	return resourceServerReadForImport(d, volumeResp)
 }