diff --git a/mongox/base/string.go b/mongox/base/string.go
new file mode 100644
index 0000000..5e3676f
--- /dev/null
+++ b/mongox/base/string.go
@@ -0,0 +1,22 @@
+package base
+
+import (
+	"github.com/mainnika/mongox-go-driver/mongox"
+)
+
+var _ mongox.BaseString = &String{}
+
+// String is a structure with string as an _id field
+type String struct {
+	ID string `bson:"_id,omitempty" json:"_id,omitempty"`
+}
+
+// GetID returns an _id
+func (db *String) GetID() string {
+	return db.ID
+}
+
+// SetID sets an _id
+func (db *String) SetID(id string) {
+	db.ID = id
+}
diff --git a/mongox/common.go b/mongox/common.go
index fa985a2..24b6342 100644
--- a/mongox/common.go
+++ b/mongox/common.go
@@ -20,3 +20,8 @@ type BaseObjectID interface {
 	GetID() primitive.ObjectID
 	SetID(id primitive.ObjectID)
 }
+
+type BaseString interface {
+	GetID() string
+	SetID(id string)
+}