Tire identification code registration system

A tire identification code registration system (18) for use with tire pressure detectors (4) and a tire pressure monitoring system (TMPS) receiver (13). Each tire pressure detector (4), which includes a unique tire identification code, is coupled to a tire (2) to detect the pressure of the tire (2) and transmit a tire pressure signal (Stp). The receiver (13) receives the tire pressure signal (Stp) and monitors the pressure of the tire (2). The tire identification code registration system (18) includes a storage manager (25) that stores, in a memory (16), tire identification codes included in wireless signals received during a predetermined storage period (TM) as candidate tire identification codes. A registration unit (27) registers the candidate tire identification codes in the memory (16) as formal tire identification codes after the storage performed by the storage manager (25) when the number of the candidate tire identification codes in the memory (16) is equal to a predetermined storage number.