To provide a communication control device, a radio communication device, a communication control method, and a radio communication method capable of properly controlling a transmission band so that a packet not reproduced but canceled because of delay of arriving time does not occur when performing communications while complementing a band by using a plurality of different radio communication paths.

The communication control device calculates a permissible reception timing area of a reception packet in respective radio communication paths (10A, 10B), analyses a band state in the radio communication paths based on the calculated permissible reception timing area, and a reception timing of the packet transmitted at the timing other than a predetermined timing in the radio communication paths, and transmits transmission control information for controlling the transmission band of the packet in the radio communication path to a packet transmission side based on the analysis result.

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