A ski-simulation exercising machine includes a base frame, two bent tubes each rotatably mounted on the base frame, two foot supports each mounted on a first end of a respective one of the two bent tubes, a rope reeved through a movable pulley and having two ends each secured on a second end of a respective one of the two bent tubes, and an antagonist resistance apparatus connected to the movable pulley. In such a manner, the ski-simulation exercising machine uses just one antagonist resistance apparatus to apply the antagonist resistance force so as to obtain the desired exercising effect.