A motorcycle, comprising: a power unit including an engine having a cylinder inclined forward; a seat provided over the power unit; a footboard having at least a part provided in front of the seat when seen in a plan view; an air cleaner provided above the power unit and under the seat and having an air outlet; an intake path that connects the air outlet of the air cleaner and an upper surface of the cylinder; and a storage box provided above the power unit and under the seat, the seat comprising: a first portion that extends backward from a front end of the seat; and a second portion provided behind the first portion, the width of the rear end of the first portion in the vehicle left-right direction being larger than the width of the front end in the vehicle left-right direction, the second portion having at least a part whose width in the vehicle left-right direction being larger than the width of the front end, the air cleaner being provided under the first portion of the seat and over the cylinder, the storage box comprising: a front portion positioned under the first portion of the seat and over the air cleaner; and a rear portion positioned under the second portion of the seat, characterized in that the air outlet is formed at a rear surface of the air cleaner; the storage box further comprises a first concave portion hollowed upward being formed at a bottom of the storage box so as to open forward and downward, and the intake path extends backward from the air outlet and is provided under the first concave portion, the storage box and the intake path overlapping each other in a side view. a power unit including an engine having a cylinder inclined forward; a seat provided over the power unit; a footboard having at least a part provided in front of the seat when seen in a plan view; an air cleaner provided above the power unit and under the seat and having an air outlet; an intake path that connects the air outlet of the air cleaner and an upper surface of the cylinder; and a storage box provided above the power unit and under the seat, the seat comprising: a first portion that extends backward from a front end of the seat; and a second portion provided behind the first portion, the width of the rear end of the first portion in the vehicle left-right direction being larger than the width of the front end in the vehicle left-right direction, the second portion having at least a part whose width in the vehicle left-right direction being larger than the width of the front end, the air cleaner being provided under the first portion of the seat and over the cylinder, the storage box comprising: a front portion positioned under the first portion of the seat and over the air cleaner; and a rear portion positioned under the second portion of the seat, characterized in that the air outlet is formed at a rear surface of the air cleaner; the storage box further comprises a first concave portion hollowed upward being formed at a bottom of the storage box so as to open forward and downward, and the intake path extends backward from the air outlet and is provided under the first concave portion, the storage box and the intake path overlapping each other in a side view. a first portion that extends backward from a front end of the seat; and a second portion provided behind the first portion, the width of the rear end of the first portion in the vehicle left-right direction being larger than the width of the front end in the vehicle left-right direction, the second portion having at least a part whose width in the vehicle left-right direction being larger than the width of the front end, the air cleaner being provided under the first portion of the seat and over the cylinder, the storage box comprising: a front portion positioned under the first portion of the seat and over the air cleaner; and a rear portion positioned under the second portion of the seat, characterized in that the air outlet is formed at a rear surface of the air cleaner; the storage box further comprises a first concave portion hollowed upward being formed at a bottom of the storage box so as to open forward and downward, and the intake path extends backward from the air outlet and is provided under the first concave portion, the storage box and the intake path overlapping each other in a side view. a front portion positioned under the first portion of the seat and over the air cleaner; and a rear portion positioned under the second portion of the seat, characterized in that the air outlet is formed at a rear surface of the air cleaner; the storage box further comprises a first concave portion hollowed upward being formed at a bottom of the storage box so as to open forward and downward, and the intake path extends backward from the air outlet and is provided under the first concave portion, the storage box and the intake path overlapping each other in a side view.