A scooter-type vehicle comprising: a body frame including a head pipe steerably supporting a steering handlebar and a low floor portion located rearwardly of the head pipe; a riding seat including a rider seat portion and a pillion passenger seat portion positioned such that the low floor portion is located between the head pipe and the riding seat; a body cover including a floor cover which covers the low floor portion from above and from both sides, and a seat side cover which covers from the side a rear portion of the body frame below the riding seat; and a pillion passenger step supported by the body frame so as to be operable between an extended position where the pillion passenger step projects from the body cover so as to make it possible to receive the foot of the pillion passenger thereon, and a stored position where the pillion passenger step is folded toward the body cover; wherein the floor cover is provided with a recessed storage portion for storing the pillion passenger step in its stored position; the floor cover is composed of a step floor cover which covers the low floor portion from above, on which the feet of a rider sitting on the rider seat portion of the riding seat can rest, and a pair of side floor covers formed separately from the step floor cover, provided continuously with both left and right sides of the step floor cover, and covering the low floor portion from the side, and the step floor cover is formed with a step-opposing wall portion forming an inner-end closing portion of the storing recessed portion so as to face the pillion passenger step located in its stored position; characterized in that a seat lower cover constituting part of the body cover and formed separately from the floor cover and the seat side cover is disposed between the floor cover and the seat side cover; and the seat lower cover is disposed so as to be tilted rearward upwardly along an upper edge of the recessed storage portion as viewed from the side. a body frame including a head pipe steerably supporting a steering handlebar and a low floor portion located rearwardly of the head pipe; a riding seat including a rider seat portion and a pillion passenger seat portion positioned such that the low floor portion is located between the head pipe and the riding seat; a body cover including a floor cover which covers the low floor portion from above and from both sides, and a seat side cover which covers from the side a rear portion of the body frame below the riding seat; and a pillion passenger step supported by the body frame so as to be operable between an extended position where the pillion passenger step projects from the body cover so as to make it possible to receive the foot of the pillion passenger thereon, and a stored position where the pillion passenger step is folded toward the body cover; wherein the floor cover is provided with a recessed storage portion for storing the pillion passenger step in its stored position; the floor cover is composed of a step floor cover which covers the low floor portion from above, on which the feet of a rider sitting on the rider seat portion of the riding seat can rest, and a pair of side floor covers formed separately from the step floor cover, provided continuously with both left and right sides of the step floor cover, and covering the low floor portion from the side, and the step floor cover is formed with a step-opposing wall portion forming an inner-end closing portion of the storing recessed portion so as to face the pillion passenger step located in its stored position; characterized in that a seat lower cover constituting part of the body cover and formed separately from the floor cover and the seat side cover is disposed between the floor cover and the seat side cover; and the seat lower cover is disposed so as to be tilted rearward upwardly along an upper edge of the recessed storage portion as viewed from the side.