Dynamics of Parallel-Turn of Alpineski robot which can rotate hip joints around the femur axes is analyzed. The Alpineski robot is taken as a model of human skier in order to clarify the relation between the motion of skier and the direction of skis. Assuming that the Alpineski robot is made of rigid body, equations of motion which connect the angle of rotation of hip joints with the edging angle of skis and the direction of skis are derived. Both carving-turn and skidding-turn are dealt with, and numerical examples are shown.