PURPOSE: To provide a seal impression collation system which can easily perform seal impression collation only by the input of an account number from a terminal.

CONSTITUTION: This system consists of a server 1 which stores seal impression data on seals corresponding to plural registration numbers relatively together with the registration numbers, client terminals 2 which each have a data input device 4 and a display unit 3, and a communication line 2 which connects the server 1 and client terminals 2; and a client terminal 2 inputs the registration number of a seal impression to be retrieved from the data input device 4 and sends it to the server 1 and displays seal impression data received from the server 1, which retrieves the seal impression data corresponding to the registration number according to the registration number received from the client terminal 2 and sends the seal impression data to the client terminal 2.