Electric seat slide device

An electric seat slide device comprising:

• at least one rail body including a first rail and a second rail that extend in a longitudinal direction along a front-rear direction of a vehicle, one of the first rail and the second rail movably provided in the longitudinal direction relative to the other of the first rail and the second rail;
• a screw shaft rotatably attached to the first rail and extending along the longitudinal direction of the first rail;
• a drive unit attached to the first rail and configured to rotationally drive the screw shaft;
• at least one stopper member attached to the first rail and arranged orthogonal to the screw shaft;
• a nut member attached to the second rail and screwed to the screw shaft;
• a fixing nut attached to an inner surface of the second rail facing the first rail, the fixing nut being located between the at least one stopper member and the nut member in a state where the first rail and the second rail are assembled to each other;
• and
• a stopper bolt inserted from an outside of the second rail which is opposite to an inside thereof facing the first rail, the stopper bolt being fastened to the fixing nut, wherein
• an end portion of the fixing nut facing the first rail is separated in a vertical direction from an end portion of the at least one stopper member facing the second rail, and
• the stopper bolt includes a stopper portion that comes into contact with the at least one stopper member when the first rail moves in an axial direction of the screw shaft relative to the second rail together with the screw shaft by a rotation of the screw shaft.