To receive the data representing a signature given on a credit card through a network, and to print on a credit card by restoring the signature on the basis of the data.

This signature restoration device comprises a signature data receiving part for receiving a coordinate data and a writing pressure data transmitted in time series as the information representing the signature input by using a tablet, a signature data storing part for storing the received data, a speed data creating part for creating the speed data representing a moving speed of a pen in inputting the signature, a speed data storing part for storing the speed data created by the speed data creating part, a line thickness determining part for determining the line thickness in accordance with a drawing position in restoring and drawing the signature on the basis of the writing pressure data and the speed data, and a signature restoring part for restoring and drawing the signature with the thickness determined by the thickness determining part on the basis of the coordinate data.