Connecting structure for connecting a load measurement device and a load input portion

A connecting structure for connecting a load measurement device and a load input portion (16) includes, an oscillating portion (50) provided at the load measurement device and oscillated upon receipt of a load from an object to be measured, the oscillating portion being applied with the load from the load input portion, a hole portion (30) provided at one of the oscillating portion and the load input portion, a shaft portion (20) provided at the other of the oscillating portion and the load input portion to be rotatably inserted into the hole portion, and a convex surface (20a) formed on at least one of an outer surface of the shaft portion and an inner surface of the hole portion to form a universal joint structure between the oscillating portion and the load input portion.