A transmission module is provided as a relay, which is capable of transmitting information smoothly and suppressing the power consumption required for the information transmission. In a transmission module that transmits specific transmission information along a predetermined transmission path including an information processing device, the specific transmission information is stored in a memory of a subject transmission module in a manner where a plurality of pieces of specific information included in the specific transmission information are arranged, with a storage location of the specific transmission information being associated with a priority level set by a priority level setting unit. A portion of the plurality of pieces of specific information is extracted in accordance with the storage location, based on a result of transmission to a downstream transmission module to form new specific transmission information to be transmitted to the downstream transmission module, and the new specific transmission information is transmitted to the downstream transmission module.