A straddle-type vehicle, comprising: left and right seat frames (23L, 23R), extending along a front-back direction of the vehicle; a storage box, comprising an open portion opened upwards in an up-down direction of the vehicle, and disposed between the left and right seat frames (23L, 23R) in a left-right direction of the vehicle; a left rear cover portion, disposed further leftward in the left-right direction of the vehicle than the left seat frame and the storage box; a right rear cover portion, disposed further rightward in the left-right direction of the vehicle than the right seat frame and the storage box; a seat portion, capable of being opened or closed relative to the open portion of the storage box; a battery unit, disposed behind the storage box in the front-back direction of the vehicle; and a vehicle electronic control device, provided with a control circuit and a driving circuit, and disposed behind the battery unit in the front-back direction of the vehicle, the driving circuit is configured for driving a driven device, wherein a heat generation quantity of the driving circuit is greater than a heat generation quantity of the control circuit; and the straddle-type vehicle being characterised in that: the seat portion is provided with a seat hook disposed at a rear portion of seat portion in the front-back direction of the vehicle and extending downwards in the up-down direction of the vehicle; a seat locking device is provided with a seat lock member for locking the seat hook and an unlocking operating member used for unlocking the seat lock member; and the battery unit is disposed below the seat locking device in the up-down direction of the vehicle, and overlaps with the seat locking device in a top view of the vehicle; an upper edge of the vehicle electronic control device is disposed in a state of protruding further above than the upper wall portion of the battery unit and is located further above than at least a part of the seat locking device in the up-down direction of the vehicle; the straddle-type vehicle being further characterised in that it comprises a spacing board, the spacing board being disposed further below than the seat portion and further above than the vehicle electronic control device in the up-down direction of the vehicle, and forming an opening for the seat hook to pass; and the opening being located further above than the upper edge of the vehicle electronic control device and above the seat locking device in the up-down direction of the vehicle, and overlapping with the seat locking device in a top view of the vehicle. left and right seat frames (23L, 23R), extending along a front-back direction of the vehicle; a storage box, comprising an open portion opened upwards in an up-down direction of the vehicle, and disposed between the left and right seat frames (23L, 23R) in a left-right direction of the vehicle; a left rear cover portion, disposed further leftward in the left-right direction of the vehicle than the left seat frame and the storage box; a right rear cover portion, disposed further rightward in the left-right direction of the vehicle than the right seat frame and the storage box; a seat portion, capable of being opened or closed relative to the open portion of the storage box; a battery unit, disposed behind the storage box in the front-back direction of the vehicle; and a vehicle electronic control device, provided with a control circuit and a driving circuit, and disposed behind the battery unit in the front-back direction of the vehicle, the driving circuit is configured for driving a driven device, wherein a heat generation quantity of the driving circuit is greater than a heat generation quantity of the control circuit; and the seat portion is provided with a seat hook disposed at a rear portion of seat portion in the front-back direction of the vehicle and extending downwards in the up-down direction of the vehicle; a seat locking device is provided with a seat lock member for locking the seat hook and an unlocking operating member used for unlocking the seat lock member; and the battery unit is disposed below the seat locking device in the up-down direction of the vehicle, and overlaps with the seat locking device in a top view of the vehicle; an upper edge of the vehicle electronic control device is disposed in a state of protruding further above than the upper wall portion of the battery unit and is located further above than at least a part of the seat locking device in the up-down direction of the vehicle; the straddle-type vehicle being further characterised in that it comprises a spacing board, the spacing board being disposed further below than the seat portion and further above than the vehicle electronic control device in the up-down direction of the vehicle, and forming an opening for the seat hook to pass; and the opening being located further above than the upper edge of the vehicle electronic control device and above the seat locking device in the up-down direction of the vehicle, and overlapping with the seat locking device in a top view of the vehicle.