A gaming machine is provided which includes: at least one operation means that accepts an input operation performed by a player when pressing down on the at least one operation means; at least one display unit having a display the player is able to see through the surface of the operation means; operation-instruction-mark output means that outputs an operation instruction mark for signaling an input timing the player performs an input operation, to the display unit for each of the operation means; evaluation means that evaluates a game score of the player based on comparison between the input-timing and an operation timing the player performed the input operation, the operation-instruction-mark output means starting to control an output of the operation instruction mark a predetermined period of time ta before the input timing, so as to change a form of the operation instruction mark little by little for the predetermined period of time ta until the input timing.