A delay correction system is used for a wireless telephone system in which a base station apparatus and at least one subscriber apparatus carry out transmitting and receiving operations via respective communication means, in conformance with a time division multiple access (TDMA) system using the base station apparatus as a synchronization reference. The delay correction system includes a measuring instruction input unit for inputting a delay measuring instruction which instructs a delay measurement, a delay measuring unit for measuring a delay quantity between the base station apparatus and the subscriber apparatus, and a first timing adjusting unit, provided in the subscriber apparatus, for receiving transmitting information which is to be sent to the base station apparatus at an allocated time slot, and for adjusting a timing of the transmitting information depending on the delay quantity before sending the transmitting information.