PURPOSE: To indicate a correlative positive/negative level corresponding to a physiological cycle related to biorhythm by providing a plurality of coupling mechanisms for mechanical or electronic mechanism having different speed ratio.

CONSTITUTION: In order to obtain the movement of three biorhythm watches, gears 2-4 are meshed about a drive gear 1. The gear 1 receives the movement directly from a drive shaft for moving a wrist watch and the gear 2 indicative of the body cycle (23 days) completes one period when the watch finishes 552 (=2×12×23) turns. The gear 3 indicative of information cycle (28 days) has a transmission ratio of 672 and the gear 4 indicative of intelligence cycle (33 days) has a transmission ratio of 792. An ordinary wrist watch is provided, on the large diameter dial 28 thereof, with three small diameter dials 29-31, i.e., three biorhythm watches referred to body, emotion and intelligence. The dials 29-31 indicate various positive and negative extents corresponding to the position of respective pointers 34 analogically with a plus code 32 or a minus code 33.