A straddled vehicle comprising: a vehicle main body that includes a body frame (1, 2, 3); a windscreen; and a screen support mechanism that supports the windscreen at the vehicle main body such that a height of the windscreen is adjustable, wherein the screen support mechanism includes a first element fixed to the vehicle main body (1, 2, 3), a second element fixed to the windscreen, and a holding element (340, 360) changeable between a first state where the holding element (340, 360) fixes the first element and the second element to each other and a second state where the holding element (340, 360) holds the second element to be movable with respect to the first element, one of the first and second elements (220, 310) has a recess-convex group alternately including a plurality of recess portions and a plurality of convex portions arranged in a first direction, and the first direction is a top-and-bottom direction in a vehicle front view, another one of the first and second elements (220, 310) has a fitting portion that includes at least one convex portion or recess portion that can be fitted with the recess-convex group, and the second element is fixed to the first element when the fitting portion is fitted with the recess-convex group, and the holding element (340, 360) is in the first state, and movable in the first direction with respect to the first element when the fitting portion is not fitted with the recess-convex group, and the holding element (340, 360) is in the second state, characterized by that the first element further has a planar supporter and a pair of left and right support poles, the planar supporter being formed to extend upward and rearward and widen in the left-and-right direction and comprises a long hole, the pair of left and right support poles being provided to extend in the first direction from the planar supporter, the second element further has a main portion corresponding to the planar supporter and a pair of left and right extension portions corresponding to the pair of support poles, and the planar supporter and the pair of support poles support the main portion and the pair of extension portions, respectively when the holding element (340, 360) is in the first state. a vehicle main body that includes a body frame (1, 2, 3); a windscreen; and a screen support mechanism that supports the windscreen at the vehicle main body such that a height of the windscreen is adjustable, wherein the screen support mechanism includes a first element fixed to the vehicle main body (1, 2, 3), a second element fixed to the windscreen, and a holding element (340, 360) changeable between a first state where the holding element (340, 360) fixes the first element and the second element to each other and a second state where the holding element (340, 360) holds the second element to be movable with respect to the first element, one of the first and second elements (220, 310) has a recess-convex group alternately including a plurality of recess portions and a plurality of convex portions arranged in a first direction, and the first direction is a top-and-bottom direction in a vehicle front view, another one of the first and second elements (220, 310) has a fitting portion that includes at least one convex portion or recess portion that can be fitted with the recess-convex group, and the second element is fixed to the first element when the fitting portion is fitted with the recess-convex group, and the holding element (340, 360) is in the first state, and movable in the first direction with respect to the first element when the fitting portion is not fitted with the recess-convex group, and the holding element (340, 360) is in the second state, characterized by that the first element further has a planar supporter and a pair of left and right support poles, the planar supporter being formed to extend upward and rearward and widen in the left-and-right direction and comprises a long hole, the pair of left and right support poles being provided to extend in the first direction from the planar supporter, the second element further has a main portion corresponding to the planar supporter and a pair of left and right extension portions corresponding to the pair of support poles, and the planar supporter and the pair of support poles support the main portion and the pair of extension portions, respectively when the holding element (340, 360) is in the first state.