A base station (10B) includes a wireless communication unit (11) for performing wireless communication with a communication terminal (30A), a radio resource allocation unit (131) for allocating an individual channel in a resource of the wireless communication, a transmission/reception timing determination unit (132) for determining a transmission/reception timing at which transmission and reception with the communication terminal (30A) through the individual channel is performed, a communication state identification unit (134) for identifying whether the communication with the communication terminal (30A) is indirect communication with interposition of a relay device (50) or direct communication without interposition of the relay device 50, and a reception timing adjustment unit (133) for adjusting a timing at which the individual channel for upstream communication is used in accordance with a result of the identification made by the communication state identification unit (134).