Recently, the self-motion mechanism has attracted attention as a new motion mechanism. By realizing micro self-moving bodies which don't need energy supply from the outside and one equipped with a power source, applications of them to environmental sensing device, and transportation equipments of small objects on water surface, are possible. Since it has been reported that the self-motion on water surface in possible by using an ionic liquid [BMIM][PF_6] (1-butyl-3-methylimidazolium hexafluorophosphate) an a fuel which causes surface tension gradient on water surface and generate propulsion force, we focused on self-motion using ionic liquids. To establish method to control driving force, driving time and moving direction of this micro self-motion mechanism powered by ionic liquids. We measured driving force of a locomotion which has a nozzle to report ionic liquid on water surface and evaluated effects of the shape of the nozzle.