To provide an apparatus for determining a motor function capable of determining the motor function by daily movements.

This apparatus for determining a motor function includes: one or more load meters 2 disposed under a table 1 on which a person to be placed and output a load on the table 1; a load calculation part 31 receiving an output value of the load meters 2 and calculating a load value on the table 1 based on the output value; a load value variation calculation part 32 for calculating variation of the load value based on the load value; and a motor function calculation part 33 for determining the a motor function from the variation.