A steering operation force detecting apparatus enabling to know in detail a force or a moment applied to a steering wheel rim (steering wheel) gripped by a driver during steering is provided. A force and a moment applied to each divided portion 11A and 11B of a steering wheel rim 11 are detected by force sensors 21A and 21B. Force applied points FP1 and FP2 of driver's hands which grip the divided portions 11A and 11B of the steering wheel rim 11 are detected by contact sensors 22 and an arithmetic processing section. Also, forces and moments at the force applied points FP1 and FP2 are calculated based on the detection results, and the calculation results are output to a higher-level device. Accordingly, it is possible to know in detail how much force or moment is applied to the force applied points FP1 and FP2 on the steering wheel rim 11 during a steering operation.