To reduce the time of connection request processing caused by the failure of retransmission and to improve data transmission efficiency from connection to cut and the reliability of connection establishment among radio communication equipments.

The plural radio communication equipments A-D retransmit data and make communication at the time of carrier detection in a radio frequency band having one control channel and plural information channels. A transmission/reception part 2 radio-transmits/receives data by the control channel and the plural information channels. A received field intensity detection part 5 detects a carrier from the received output of the transmission/reception part 2. A radio control part 1 transmits data when it receives a regular connection request through the transmission/reception part 2 and reads a retransmission priority number stored in a number registration part 4 when a retransmission connection request is received. A timer part 3 retransmits data when counting corresponding to the retransmission priority number terminates and controls the respective radio communication equipments A-D so that they retransmit data in different retransmission priority.