A vehicle simulator comprising: a pilot's cabin which is suited to accommodate at least one pilot of the vehicle, at least one screen which is arranged in front of the pilot's cabin, and a moving system which supports the pilot's cabin and is suited to move the pilot's cabin in the space; wherein the moving system comprises: a fixed base arranged horizontally; a mobile platform, which supports the pilot's cabin and rests on the fixed base so as to freely slide on the fixed base; and at least one actuator device, which is mechanically connected to the mobile platform so as to impart to the mobile platform a movement relative to the fixed base; wherein the actuator device comprises: at least one flexible thread-like element, which is mechanically connected to the mobile platform; and a motorized mechanism, which always keeps the total free length of the flexible thread-like element constant and is suited to apply a pulling force to the flexible thread-like element, so as to always keep the flexible thread-like element in tension and, when needed, pull the mobile platform towards an edge of the fixed base; the vehicle simulator is characterized in that the motorized mechanism comprises: at least one first pulley mounted on the mobile platform and around which the flexible thread-like element is wound; at least one straight guide arranged in front of the first pulley of the mobile platform; and a slide, which is mounted so as to move along the straight guide and supports at least one second pulley, which is mounted on the slide and around which the flexible thread-like element is wound. a fixed base arranged horizontally; a mobile platform, which supports the pilot's cabin and rests on the fixed base so as to freely slide on the fixed base; and at least one actuator device, which is mechanically connected to the mobile platform so as to impart to the mobile platform a movement relative to the fixed base; wherein the actuator device comprises: at least one flexible thread-like element, which is mechanically connected to the mobile platform; and a motorized mechanism, which always keeps the total free length of the flexible thread-like element constant and is suited to apply a pulling force to the flexible thread-like element, so as to always keep the flexible thread-like element in tension and, when needed, pull the mobile platform towards an edge of the fixed base; the vehicle simulator is characterized in that the motorized mechanism comprises: at least one first pulley mounted on the mobile platform and around which the flexible thread-like element is wound; at least one straight guide arranged in front of the first pulley of the mobile platform; and a slide, which is mounted so as to move along the straight guide and supports at least one second pulley, which is mounted on the slide and around which the flexible thread-like element is wound. at least one flexible thread-like element, which is mechanically connected to the mobile platform; and a motorized mechanism, which always keeps the total free length of the flexible thread-like element constant and is suited to apply a pulling force to the flexible thread-like element, so as to always keep the flexible thread-like element in tension and, when needed, pull the mobile platform towards an edge of the fixed base; the vehicle simulator is characterized in that the motorized mechanism comprises: at least one first pulley mounted on the mobile platform and around which the flexible thread-like element is wound; at least one straight guide arranged in front of the first pulley of the mobile platform; and a slide, which is mounted so as to move along the straight guide and supports at least one second pulley, which is mounted on the slide and around which the flexible thread-like element is wound. at least one first pulley mounted on the mobile platform and around which the flexible thread-like element is wound; at least one straight guide arranged in front of the first pulley of the mobile platform; and a slide, which is mounted so as to move along the straight guide and supports at least one second pulley, which is mounted on the slide and around which the flexible thread-like element is wound.