PROBLEM TO BE SOLVED: To provide a communication management device which shortens the time during which a token frame disappears and no communication node can transmit data.SOLUTION: In a token passing system, communication apparatuses which are a communication management device or communication nodes are connected, a token indicating a transmission right is circulated through a plurality of communication apparatuses and a communication apparatus that receives the token transmits data. In the token passing system, when a token frame including a token to be broadcasted is received from a receiving section, a transmission/reception data processing section of the communication management device starts a token monitoring timer at a value based on a token hold time for a communication node that becomes a destination of the token to hold the token. When the token monitoring timer reaches time-out, a token frame defining a next communication node to which the token is next circulated as a destination of the token is
