A kick scooter comprising a deck assembly and a handlebar assembly; wherein; the handlebar assembly comprises a transversal handlebar and a stand column, one end of the stand column being connected to the transversal handlebar and the other end of the stand column being provided with a connecting post, an axial direction of the connecting post forming an obtuse angle with an axial direction of the stand column; a plug hole is provided in the deck assembly and cooperates with the connecting post by insertion, an axial direction of the plug hole forming a sharp angle with a direction of extension of the deck assembly; when the connecting post is located outside the plug hole, the handlebar assembly is separated from the deck assembly; two locking slots are provided at an insertion opening of the plug hole and arranged respectively on two sides of the plug hole; and the connecting post is provided with a locking protrusion that is located inside one of the locking slots when the connecting post is inserted into the plug hole; by means of the cooperation between the locking protrusion and the one of the locking slots, the connecting post is inserted into the plug hole at a predetermined angle, and the rotation of the connecting post inside the plug hole is able to be limited; after the handlebar assembly has rotated 180° around the axial direction of the connecting post, the connecting post is able to be inserted into the plug hole at a changed angle, so as to make the handlebar assembly switch between a deployed position and a folded position; characterized in that a reinforcing rib is provided at the junction between a connecting tube and the connecting post, the reinforcing rib being connected with the locking protrusion. the handlebar assembly comprises a transversal handlebar and a stand column, one end of the stand column being connected to the transversal handlebar and the other end of the stand column being provided with a connecting post, an axial direction of the connecting post forming an obtuse angle with an axial direction of the stand column; a plug hole is provided in the deck assembly and cooperates with the connecting post by insertion, an axial direction of the plug hole forming a sharp angle with a direction of extension of the deck assembly; when the connecting post is located outside the plug hole, the handlebar assembly is separated from the deck assembly; two locking slots are provided at an insertion opening of the plug hole and arranged respectively on two sides of the plug hole; and the connecting post is provided with a locking protrusion that is located inside one of the locking slots when the connecting post is inserted into the plug hole; by means of the cooperation between the locking protrusion and the one of the locking slots, the connecting post is inserted into the plug hole at a predetermined angle, and the rotation of the connecting post inside the plug hole is able to be limited; after the handlebar assembly has rotated 180° around the axial direction of the connecting post, the connecting post is able to be inserted into the plug hole at a changed angle, so as to make the handlebar assembly switch between a deployed position and a folded position; characterized in that a reinforcing rib is provided at the junction between a connecting tube and the connecting post, the reinforcing rib being connected with the locking protrusion.