PURPOSE: To obtain a timer which is easy to operate and use by setting a frequency of repetition in a counter and allowing the counter to go down on every repetition, and thus performing repetitive timer operation according to the set value and also varying a final repetitive time alarm tone.

CONSTITUTION: When a switch 10 is operated, a presetting circuit 14 is controlled through an FF7, a monostable multivibrator 13, etc., to supply the contents of a counter 5 for holding set time to a counter 6 for subtraction of timer time, thereby starting timer operation. When the counter 6 goes down to zero the timer time later, the completion of the timer time is reported through a speaker 22 via a zero detecting circuit 16, and while the frequency of repetition set in a decimal counter 4 for setting the frequency of repetition is decreased by one, the circuit 14 is controlled to perform repetitive timer operation. Once the ending of the repetition up to the set frequency is detected, a gate is controlled by a zero detecting circuit 15 to report the ending through a speaker 22 in a different frequency tone, and the timer stops automatically, thus obtaining the timer which is easy to operate and use.