To provide an RF sinthesizing distributing apparatus capable of countermeasuring a fault or the like without affecting other frequency bands when the fault or the like in a frequency band requires countermeasuring.

In the RF synthesizing distributing apparatus, frequency modules 210, 220, 230 are configured to respectively process frequency bands A MHz, B GHz, C GHz. Accordingly, when countermeasures to be applied to the fault, replacement, and removal are required, the fault countermeasure; the replacement or the removal can be executed without affecting the frequency modules of the other frequency bands. Each frequency module is freely removably contained in the RF composing distributing apparatus 260, and each frequency module can easily be attached to/detached from the RF composing distributing apparatus 260. Moreover, connections 250, 251, 252 apply composition/distribution to a transmission signal and reception signal processed by each frequency module, the transmission and reception signals to be processed can optimally be adapted to the arrangement of E/O units and O/E units.