A method and an apparatus for controlling a radio parameter, as well as a network operation management apparatus and a radio base station, are provided that enable optimization control taking a dead zone into consideration. A radio parameter control apparatus (10) for controlling a radio parameter of a radio base station (20) includes a measured data analysis section (101) that analyzes data measured by a plurality of radio terminals including a radio terminal in idle state to detect a dead zone in a radio cell, and a radio parameter control section (102) that controls the radio parameter of the radio base station based on information regarding the dead zone.