The radio receiving apparatus including an adaptive receive filter capable of detecting an interference wave and out-of-band noise level correctly and improving reception performance. Adaptive receive filter section 200 of radio receiving apparatus 100 has filtering section 207 that is configured with a plurality of filters, received signal power measuring section 211 that measures the overall received signal power, calculator 212 that performs calculation that associates the measured received signal power with output of AGC 104, interference power measuring section 213 that measures signal power in a frequency band outside a necessary band of the received signal, comparator 215 that compares the calculation result by calculator 212 with a specific threshold, comparator 215 that compares the calculation result by calculator 212 with a specific threshold, and switches 205 and 206 that select a filter to be adopted from filtering section 207 from the outputs of comparators 214 and 215, and detects adjacent interference based on signal power in the frequency band outside the signal band and detects the noise level based on the power level at the antenna end.