PURPOSE: To obtain a measuring device for carrying out reproduction of cow at optimum period.

CONSTITUTION: In a mounting action-measuring device composed of switch means 1 attached to animal C to be mounted and operated by mounting action, measuring means 2 by for measuring operating timer or operating frequency of the switch means 1, alarm means 4 informed when measured result by the measuring means 2 reaches set value and memory means 3 for storing the set value, plural memory regions for storing plural set values different by difference of individual of the above-mentioned animal C to be mounted are provided in the above-mentioned memory means 3 and simultaneously selection means 5 for selecting a specific region of the above-mentioned region in which set value to be operated is stored is provided in the above-mentioned memory means 3.