Summary : The role of vision in simple graphie movement direction. This study examined the role of vision on syntactical organization of drawing production. In accordance with Meulenbroek and Thomassen's point of view (1991), a qualitative difference in the production of horizontals-verticals and obliques is postulated. Right-handed adults were required to copy geometrical figures composed of either three horizontals and verticals or three obliques, in the absence of visual control or under visuo-proprioceptive discordant conditions (mirror-drawing task). Data confirmed the importance of visual feedback on the production of horizontal and vertical directions. The dominance of the visual modality on proprioceptive modality was observed in conflictual situations. The results suggest the importance of visual control on the selection of privileged directions in graphic movements. Key words : vision, mirror-drawing, movement directions, geometrical reference system, anatomical reference system.