Abstract: A bingo game timer apparatus for cooperation with a device capable of supplying bingo indicia carrying articles, such as balls, one after the other along a path, to assist the bingo game operator in calling out bingo indicia to be played. The timer apparatus includes a limit switch having an actuator positioned for actuation by a ball moving along the path. A timer responds to actuation of the limit switch for timing an interval adjustable to be sufficient for the operator to call out, and the players to play, the bingo letter and number on a given ball. Signal lamps alternately respond to the state of the timer for signaling the occurrence of the interval to the operator.