A straddled vehicle comprising: a seat including a first seat portion on which a rider sits, and a second seat portion on which a pillion passenger sits, the second seat portion being disposed behind the first seat portion; a flat footboard disposed forward and downward relative to the first seat portion, the flat footboard including a first footrest on which the rider puts their foot or feet; an under-seat cover at least partially disposed under the first seat portion, the under-seat cover being connected to a rear edge of the first footrest; a power unit at least partially disposed behind the under-seat cover; at least one side cover (46L, 46R) disposed below the second seat portion and behind the under-seat cover in a side view of the vehicle, the side cover (46L, 46R) being a component separate from the under-seat cover; and at least one second footrest (56L, 56R) on which the pillion passenger puts their foot, the second footrest (56L, 56R) being disposed rearward relative to a front end of the under-seat cover, and downward relative to the second seat portion, the flat footboard further including at least one rearward extension (38L, 38R) passing through a region below the under-seat cover in the side view of the vehicle, passing through a region laterally outward of the under-seat cover in a plan view of the vehicle, and extending rearward toward the second footrest (56L, 56R), the side cover (46L, 46R) including a downward extension (47L, 47R) extending downward toward the flat footboard, characterised by: the downward extension (47L, 47R) passing through a region laterally outward of the rearward extension (38L, 38R) and being connected to the rearward extension (38L, 38R). a seat including a first seat portion on which a rider sits, and a second seat portion on which a pillion passenger sits, the a first seat portion on which a rider sits, and a second seat portion on which a pillion passenger sits, the second seat portion being disposed behind the first seat portion; a flat footboard disposed forward and downward relative to the first seat portion, the flat footboard including a first footrest on which the rider puts their foot or feet; an under-seat cover at least partially disposed under the first seat portion, the under-seat cover being connected to a rear edge of the first footrest; a power unit at least partially disposed behind the under-seat cover; at least one side cover (46L, 46R) disposed below the second seat portion and behind the under-seat cover in a side view of the vehicle, the side cover (46L, 46R) being a component separate from the under-seat cover; and at least one second footrest (56L, 56R) on which the pillion passenger puts their foot, the second footrest (56L, 56R) being disposed rearward relative to a front end of the under-seat cover, and downward relative to the second seat portion, the flat footboard further including at least one rearward extension (38L, 38R) passing through a region below the under-seat cover in the side view of the vehicle, passing through a region laterally outward of the under-seat cover in a plan view of the vehicle, and extending rearward toward the second footrest (56L, 56R), the side cover (46L, 46R) including a downward extension (47L, 47R) extending downward toward the flat footboard, characterised by: the downward extension (47L, 47R) passing through a region laterally outward of the rearward extension (38L, 38R) and being connected to the rearward extension (38L, 38R). the downward extension (47L, 47R) passing through a region laterally outward of the rearward extension (38L, 38R) and being connected to the rearward extension (38L, 38R).