Disclosed are a method for changing a serving cell in a wireless communication system and an apparatus therefor. Specifically, the method performed by a UE may include: transmitting, to a serving cell, a measurement report for signals received from the serving cell and one or more cells; when a measurement value for a signal received from at least one cell among the one or more cells satisfies a predetermined specific triggering condition, receiving, from the serving cell, information representing that the at least one cell corresponds to a candidate cell for changing the serving cell; and performing synchronization for at least one of a downlink or an uplink with the at least one cell, by transmitting a specific uplink signal to the at least one cell.