A radio wave control apparatus comprising: a detecting unit configured to detect an object, other than a communication target device, in a radiation range to which a radio wave radiating unit (2; 2a) radiates a predetermined radio wave in each of a plurality of radiation directions, the radiation range being an area in which the radio wave radiating unit radiates; and a radiation range determining unit (20 - 25) including: a radio wave output judging unit configured to reduce a radio wave output in one radiation direction of the radiation directions from a maximum value on a predetermined-value basis, and judge whether a radiation range covering the radiation direction using the reduced radio wave output does not cover an entire communication range in which the communication target device is communicable using the predetermined radio waves, or whether a no-communication area that is caused when the predetermined radio waves reflect on the object is caused in the communication range, the no-communication area being an area in which the radio wave radiation unit is incommunicable with the communication target device; and a radio wave output determining unit configured to, when the radio wave output judging unit judges that the radiation range does not cover the entire communication range, or that the no-communication area is caused in the communication range, determine the radio wave output before the reduction as the radio wave output in the radiation direction and determine the radio wave output in each of the radiation directions; wherein the radiation range determining unit (20, 22, 23) is configured to determine a radiation direction in which the radio wave radiation unit (2, 2a) radiates radio waves among a plurality of radiation directions such that the predetermined radio waves are radiated over the entire communication range, and a no-communication area is not caused in the communication range. a detecting unit configured to detect an object, other than a communication target device, in a radiation range to which a radio wave radiating unit (2; 2a) radiates a predetermined radio wave in each of a plurality of radiation directions, the radiation range being an area in which the radio wave radiating unit radiates; and a radiation range determining unit (20 - 25) including: a radio wave output judging unit configured to reduce a radio wave output in one radiation direction of the radiation directions from a maximum value on a predetermined-value basis, and judge whether a radiation range covering the radiation direction using the reduced radio wave output does not cover an entire communication range in which the communication target device is communicable using the predetermined radio waves, or whether a no-communication area that is caused when the predetermined radio waves reflect on the object is caused in the communication range, the no-communication area being an area in which the radio wave radiation unit is incommunicable with the communication target device; and a radio wave output determining unit configured to, when the radio wave output judging unit judges that the radiation range does not cover the entire communication range, or that the no-communication area is caused in the communication range, determine the radio wave output before the reduction as the radio wave output in the radiation direction and determine the radio wave output in each of the radiation directions; wherein a radio wave output judging unit configured to reduce a radio wave output in one radiation direction of the radiation directions from a maximum value on a predetermined-value basis, and judge whether a radiation range covering the radiation direction using the reduced radio wave output does not cover an entire communication range in which the communication target device is communicable using the predetermined radio waves, or whether a no-communication area that is caused when the predetermined radio waves reflect on the object is caused in the communication range, the no-communication area being an area in which the radio wave radiation unit is incommunicable with the communication target device; and a radio wave output determining unit configured to, when the radio wave output judging unit judges that the radiation range does not cover the entire communication range, or that the no-communication area is caused in the communication range, determine the radio wave output before the reduction as the radio wave output in the radiation direction and determine the radio wave output in each of the radiation directions; wherein the radiation range determining unit (20, 22, 23) is configured to determine a radiation direction in which the radio wave radiation unit (2, 2a) radiates radio waves among a plurality of radiation directions such that the predetermined radio waves are radiated over the entire communication range, and a no-communication area is not caused in the communication range.