A mobile communication method which allows a mobile station and a base station to communicate based on an HSDPA communication mode with a possibility of erroneous base station switching due to erroneous detection of a signal reduced to improve reliability of a mobile communication system, in which, when the mobile station moves from one base station into an area of other base station (S203), other base station as a moving destination transmits a dummy signal for notifying base station switching to the mobile station prior to transmission of actual information (S307), and the mobile station, in response to reception of the dummy signal, decodes an HS-SCCH signal up to part 2 information (S210), examines CRC included in the part 2 information, and when the CRC is normal (YES at S211), switches the base station (S213, S217).