To prevent mismatching about power supply between a terminal body and a radio unit from occurring by transferring power management information to a body part when a radio unit storing the power management information is attached to the body part.

A removable radio unit A 10 and a radio unit C 20 can be attached and detached to/from a portable communication terminal body B 30. Since power supply management data A assumes PHS correspondence, it can be driven even when power consumption at the time of speech communication is small. On the other hand, since power supply management data C assumes a radio carrier, it can not be driven unless power consumption at the time of speech communication is large. When the unit A 10 or the unit C 20 is attached to the body B 30, the data A or the data D stored in storing parts A 14 or C 24 of the units A 10 or C 20 is transferred to the body B 30 and the power management of an attached radio unit is performed based on the management data.