A motorcycle comprising: a head pipe provided in a front portion of a body frame; a handle supported by the head pipe and which can be steered by a rider; a seat supported by said body frame and on which the rider can sit; left and right side body covers (43L, 43R) provided below the seat and covering sides of a vehicle body; a straddle space provided between said seat and said handle and where the rider can straddle when mounting and dismounting; a center cover formed in the straddle space and bridged across said left and right side body covers (43L, 43R); and a fuel lid openably attached to the center cover in such a manner as to be surrounded by the center cover, wherein a concave portion depressed downward is provided in a center portion of said center cover in the vehicle width direction; said fuel lid can be closed so as to be accommodated in said concave portion; an opening covered with said fuel lid is provided in said center cover; a fuel tank is provided below said fuel lid; a fuel filler port is provided in an upper face of said fuel tank; a fuel tray is provided in the upper face of said fuel tank in such a manner as to surround the fuel filler port; a drain pipe for discharging excess fuel to the outside of the vehicle is connected to said fuel tray; and a liquid guide portion for guiding liquid to the fuel tray is formed in the concave portion formed in the center cover; characterized in that a liquid guide rib for guiding liquid to said fuel tray is formed in said concave portion formed in said center cover, wherein the liquid guide rib, which extends in such a manner as to surround left and right sides as well as the rear of the opening, is provided in a standing manner in an upper portion of the liquid guide portion and notches (98a, 98a) are formed in parts of a rear portion of the liquid guide rib so that liquid having run down the liquid guide rib is adapted to flow downward from the notches (98a, 98a) and to be introduced to the fuel tray. a head pipe provided in a front portion of a body frame; a handle supported by the head pipe and which can be steered by a rider; a seat supported by said body frame and on which the rider can sit; left and right side body covers (43L, 43R) provided below the seat and covering sides of a vehicle body; a straddle space provided between said seat and said handle and where the rider can straddle when mounting and dismounting; a center cover formed in the straddle space and bridged across said left and right side body covers (43L, 43R); and a fuel lid openably attached to the center cover in such a manner as to be surrounded by the center cover, wherein a concave portion depressed downward is provided in a center portion of said center cover in the vehicle width direction; said fuel lid can be closed so as to be accommodated in said concave portion; an opening covered with said fuel lid is provided in said center cover; a fuel tank is provided below said fuel lid; a fuel filler port is provided in an upper face of said fuel tank; a fuel tray is provided in the upper face of said fuel tank in such a manner as to surround the fuel filler port; a drain pipe for discharging excess fuel to the outside of the vehicle is connected to said fuel tray; and a liquid guide portion for guiding liquid to the fuel tray is formed in the concave portion formed in the center cover; characterized in that a liquid guide rib for guiding liquid to said fuel tray is formed in said concave portion formed in said center cover, wherein the liquid guide rib, which extends in such a manner as to surround left and right sides as well as the rear of the opening, is provided in a standing manner in an upper portion of the liquid guide portion and notches (98a, 98a) are formed in parts of a rear portion of the liquid guide rib so that liquid having run down the liquid guide rib is adapted to flow downward from the notches (98a, 98a) and to be introduced to the fuel tray.