The present invention relates to a simulator for simulating the movement of a horse comprising: a base; a body portion for receipt of a rider and having a longitudinal axis corresponding to the simulated forward and backward movement of a horse; a first linkage extending between said body portion and said base; a second linkage extending between said body portion; and a mechanism capable of providing vertical and horizontal movement to the longitudinal axis of the body portion. The present invention also relates to a kit of parts for producing the simulator. The simulator is particularly useful as a training aid for people to ride horses, in addition to improving stamina and general fitness.