A PCV valve includes a cover of which an inlet is formed thereto, a body connected to the cover to form a hydraulic path therein and the body of which an outlet is formed thereto, a valve body including a valve head and disposed within the hydraulic path for the valve head to selectively block the inlet and an elastic portion which contacts the valve head and elastically supports the valve body within the hydraulic path, wherein a valve head gas groove is formed to a surface of the valve head that contacts the elastic portion.