In order to enable simultaneous communication using a plurality of frequencies, provided is a mobile communication terminal including: a first combining circuit 210 that receives transmission signals of two frequency bands, and outputs a combined signal; a triplexer 220 including: a transmitting filter 221 that filters the signal inputted by the first combining circuit 210 and outputs the resultant signal; and a receiving filter A 222 and a receiving filter B 223 that each filter an inputted given signal and output the resultant signal; a combined signal filter 230 including: a filter P 231 having the same pass characteristic as that of the transmitting filter 221; and a filter Q 232 having the same pass characteristic as that of the receiving filter B 223, the combined signal filter 230 filtering the signal outputted by the first combining circuit 210 and outputting the resultant signal; a phase adjuster 240 that adjusts a phase of the signal outputted by the combined signal filter 230 to a phase opposite to that of an interference signal, and outputs the resultant signal; and a second combining circuit 250 that combines the signal outputted by the phase adjuster 240 with a signal (interference signal) that passes through both the transmitting filter 221 and the receiving filter B 223.