A straddled vehicle comprising: a vehicle body frame including a head pipe; a steering device supported by the head pipe; an engine disposed below and backward of the head pipe; a head pipe storage portion including a front cover and a back cover, the front cover being at least in part disposed in front of the head pipe, the back cover being at least in part disposed behind the head pipe, the front cover and the back cover forming therebetween an inner space in which the head pipe is accommodated; and an engine control unit configured to control the engine, wherein the head pipe extends backward from a lower opening end thereof to an upper opening end thereof, the head pipe storage portion includes an opened portion provided below the head pipe, the steering device extends outward from the inner space through the opened portion, the back cover includes a middle portion, a left lateral portion and a right lateral portion, the middle portion overlapping the head pipe as seen in a rear view, the left lateral portion being located laterally leftward of the middle portion, the right lateral portion being located laterally rightward of the middle portion, at least one of the left lateral portion and the right lateral portion being located forward of a rear end edge of the head pipe, the engine control unit is disposed in front of the head pipe in the inner space of the head pipe storage portion, the axis of the head pipe extends backward and upward as seen in the vehicle side view, and the engine control unit is dimensioned to be greater in both a length direction thereof and a width direction thereof than in a thickness direction thereof, characterized in that the engine control unit overlaps at least part of the head pipe as seen in a vehicle front view, the engine control unit includes a main heat radiating surface (441,444), the main heat radiating surface (441,444) extending in both the length direction and the width direction as seen in the thickness direction, the main heat radiating surface (441,444) extends in a direction intersecting with a direction of an axis of the head pipe as seen in a vehicle side view, and the main heat radiating surface (441,444) extends forward and upward as seen in the vehicle side view, and the thickness direction extends forward and downward as seen in the vehicle side view. a vehicle body frame including a head pipe; a steering device supported by the head pipe; an engine disposed below and backward of the head pipe; a head pipe storage portion including a front cover and a back cover, the front cover being at least in part disposed in front of the head pipe, the back cover being at least in part disposed behind the head pipe, the front cover and the back cover forming therebetween an inner space in which the head pipe is accommodated; and an engine control unit configured to control the engine, wherein the head pipe extends backward from a lower opening end thereof to an upper opening end thereof, the head pipe storage portion includes an opened portion provided below the head pipe, the steering device extends outward from the inner space through the opened portion, the back cover includes a middle portion, a left lateral portion and a right lateral portion, the middle portion overlapping the head pipe as seen in a rear view, the left lateral portion being located laterally leftward of the middle portion, the right lateral portion being located laterally rightward of the middle portion, at least one of the left lateral portion and the right lateral portion being located forward of a rear end edge of the head pipe, the engine control unit is disposed in front of the head pipe in the inner space of the head pipe storage portion, the axis of the head pipe extends backward and upward as seen in the vehicle side view, and the engine control unit is dimensioned to be greater in both a length direction thereof and a width direction thereof than in a thickness direction thereof, characterized in that the engine control unit overlaps at least part of the head pipe as seen in a vehicle front view, the engine control unit includes a main heat radiating surface (441,444), the main heat radiating surface (441,444) extending in both the length direction and the width direction as seen in the thickness direction, the main heat radiating surface (441,444) extends in a direction intersecting with a direction of an axis of the head pipe as seen in a vehicle side view, and the main heat radiating surface (441,444) extends forward and upward as seen in the vehicle side view, and the thickness direction extends forward and downward as seen in the vehicle side view.