In a receiver having an antenna switch (23) which is connected between a receiving section (24) and an antenna (21) for adjusting a received signal so that the received signal has, as a current signal level, one of a first and a second signal level, a switch control section (26) controls an operation of the antenna switch by the use of a current signal level of the received signal and a first and a second reference level which are determined in first and second determining sections (27, 28), respectively. In order to detect the current signal level, a signal level detection circuit (25) is connected to the antenna switch. It is preferable that a signal level holding circuit (34) is connected between the signal level detection circuit and the switch control section and is for holding the current signal level during a predetermined time duration.