A wireless communication apparatus and a frequency channel selecting method. The wireless communication apparatus includes a transmitting/receiving unit, a storage unit storing updateable indexes relating to a communication condition, an evaluation reference updating unit for updating a reference of a communication quality based on the stored indexes, and a controller that selects frequency channels to communicate data and instructs the transmitting/receiving unit to switch to the selected frequency channels. The frequency channel selecting method includes updating an index representative of a communication quality of a wireless communication for each of a plurality of frequency channels, storing the updateable indexes, updating a reference of a communication quality based on the stored indexes, and selecting frequency channels for communicating based on the updated reference. The communication apparatus and frequency selecting method readily and flexibly select frequency channels with an acceptable communication quality using the updateable index and reference.