A load detection device includes a strain generating body having first and second holes at first and second ends of the strain generating body, a strain gauge attached on the strain generating body, first and second fixing members having first and second middle shaft portion press-fitted into the first and second holes, respectively, and having first and second end shaft portions protruding from the first and second middle shaft portions, respectively, a bracket member having first fixing portion including a first fixing hole into which the first end shaft portion is press-fitted, and a second fixing portion, integrally connected to the first fixing portion and including a second fixing hole into which the second end shaft portion is inserted with a clearance therebetween, a press-fit fixing member press-fitted onto the second end shaft portion, and a connecting shaft integrally connected to the strain generating body.