A data processing section (30) selects either base station mode or terminal mode and executes communication. A control section (32) controls operations relating to the base station mode and the terminal mode. A receiving section (130) receives an instruction to switch to the base station mode from other wireless device set in the base station mode, in the case where communication is set in the terminal mode. An AP switching section (132) switches to the base station mode in accordance with the instruction. An instructing section (134) instructs other wireless devices set in the terminal mode to switch to the base station mode, after a predetermined period is passed from the time when the mode is switched to the base station mode. An STA switching section (136) switches to the terminal mode after giving the instruction.