This is a load cell which measures an external force passed to the tire from the road surface while the car is running, by breaking the force down into orthogonal three-component force and three moments around the force axes. Highly precise measurement is possible in every driving condition owing to its load detecting part with reasonably arranged strain gauges, slip ring and rotary encoder assembly with improved vibration resistance, and waterproof structure. This transducer is used together with the exclusive 6-component force analyzer MFT-306. The 6-component force is indicated in a coordinate system based on the car body.