A straddled vehicle comprising: a head pipe; a body frame comprising a main frame extending rearward and obliquely downward from the head pipe and a rear frame extending rearward and obliquely upward from the main frame; a seat, supported by the rear frame, for a rider to sit on; a power unit, non-swingably supported by the main frame, at least a portion of which is disposed laterally between a left side and a right side of the main frame,and a storage compartment at least a portion of which is disposed behind the head pipe, in front of the seat, and above the power unit, the storage compartment comprising: a storage box comprising a storage space provided therein, and at least one opening provided in at least one lateral side thereof and communicating with the storage space; and at least one side cover disposed laterally outward relative to the at least one opening of the storage box, attached to the storage box, and configured to be capable of opening and closing the at least opening, at least a portion of the power unit is disposed below the main frame as viewed from a side view of the vehicle and wherein the or each side cover comprises a protruding portion, provided in at least a portion of an outer peripheral portion of the side cover as viewed from a side view of the vehicle and protruding in a vehicle width direction, and a recessed or open portion, provided in a central portion thereof surrounded by the outer peripheral portion, and recessed in a vehicle width direction relative to the protruding portion. a head pipe; a body frame comprising a main frame extending rearward and obliquely downward from the head pipe and a rear frame extending rearward and obliquely upward from the main frame; a seat, supported by the rear frame, for a rider to sit on; a power unit, non-swingably supported by the main frame, at least a portion of which is disposed laterally between a left side and a right side of the main frame,and a storage compartment at least a portion of which is disposed behind the head pipe, in front of the seat, and above the power unit, the storage compartment comprising: a storage box comprising a storage space provided therein, and at least one opening provided in at least one lateral side thereof and communicating with the storage space; and at least one side cover disposed laterally outward relative to the at least one opening of the storage box, attached to the storage box, and configured to be capable of opening and closing the at least opening, at least a portion of the power unit is disposed below the main frame as viewed from a side view of the vehicle and wherein a storage box comprising a storage space provided therein, and at least one opening provided in at least one lateral side thereof and communicating with the storage space; and at least one side cover disposed laterally outward relative to the at least one opening of the storage box, attached to the storage box, and configured to be capable of opening and closing the at least opening, at least a portion of the power unit is disposed below the main frame as viewed from a side view of the vehicle and wherein the or each side cover comprises a protruding portion, provided in at least a portion of an outer peripheral portion of the side cover as viewed from a side view of the vehicle and protruding in a vehicle width direction, and a recessed or open portion, provided in a central portion thereof surrounded by the outer peripheral portion, and recessed in a vehicle width direction relative to the protruding portion.