According to an aspect of the present invention, a method for adjusting a Periodic-Tracking Area Update (P-TAU) timing performed by a user equipment in a wireless communication system may include transmitting P-TAU support information indicating that an adjustment of the P-TAU timing is available to a Mobility Management Entity (MME) through an Attach request message or a TAU request message; receiving a request accept message with respect to the Attach request message or the TAU request message; and adjusting the P-TAU timing in accordance with an eDRX application timing based on the P-TAU timing adjustment condition information when the request accept message includes the −TAU timing adjustment condition information.