Provided is a riding posture outputting device that is able to determine a riding posture with accuracy. The riding posture outputting device includes a communication unit which acquires a crank rotation angle θ of a bicycle, and a propulsion force and a loss force which are added to a crank in the crank rotation angle θ, and a determination unit which determines whether a user is dancing on the basis of the crank rotation angle θ when the load calculated from the propulsion force Ft and the loss force Fr is maximized. Then, the communication unit outputs a determination result obtained by the determination of the determination unit.