PURPOSE: To make it possible to diagnose a recorded uterus contraction curve is refering to a posture information record by performing digital signal treatments on a uterus contraction curve information and a posture information and recording continuously them.

CONSTITUTION: A uterus contraction curve information 8 detected by means of a sensor 10 for measuring uterus contraction attached to a specified position on a body of an object A is input in a recording apparatus 12 and is converted to a digital signal 13 by means of an AD converting part 4 through a uterus contraction curve input part 2 and a main amplifying part 3. A posture deviation information 11 of an object A detected by means of a mercury switch 9 which is a posture sensor based on control by a main control part 7 and the digital signal 13 are treated by a digital signal treating part 5 and are stored in a memory 6. It is possible thereby the diagnose the uterus contraction curve in refering to the posture deviation information.