A synchronization apparatus includes a receiver that receives data from a synchronization apparatus of another node that performs synchronization with its own node from among the plurality of synchronization apparatuses and extracts synchronization information from the received data, a transmitter that transmits the data to the synchronization apparatus of the other node, a receiving state register that stores the extracted synchronization information, a delay unit that delays the received data by a specified period of time, and a controller that stores the extracted synchronization information and synchronization information from its own controller in the reception state register and causes the transmitter to transmit the data to the other node and returns the data to its own node back to its own controller via the delay unit when the extracted synchronization information and the synchronization information from its own controller are stored in the reception state register.