An engine unit comprising: an engine main body unit which includes a crankcase member forming a lubrication space in which lubricant is provided and a crankshaft member provided in the lubrication space and including a crank web; and an electronically-controlled continuously variable transmission apparatus including: a continuously variable transmission including: a primary pulley which is rotatable in accordance with rotation of the crankshaft member and includes at least one primary movable sheave movable in a rotational axis direction; a secondary pulley; a dry belt which is wound onto the primary pulley and the secondary pulley and has a slide portion which is in contact with the primary pulley and the secondary pulley and is not lubricated by the lubricant; and a dry belt casing which forms a dry space in which the primary pulley, the secondary pulley, and the dry belt are provided, a primary rotational axis (Ap) which is the rotational axis of the at least one primary movable sheave being on the same line as or being parallel to a crank rotational axis (Ac) which is the rotational axis of the crankshaft member; a rotational force transmission mechanism which is configured to transmit a rotational force of an electric motor; and a rotational force conversion mechanism configured to move the at least one primary movable sheave in the direction of the primary rotational axis (Ap) and includes (a) a rotating member which is rotatable by the rotational force transmitted from the rotational force transmission mechanism and (b) a relative moving member which is in contact with the rotating member and is movable by the rotational force of the rotating member in the direction of the primary rotational axis (Ap) relative to the rotating member, the rotational force conversion mechanism being provided (i) at a position not overlapping a rotation range of the crank web when viewed in the direction of the crank rotational axis (Ac), and/or (ii) at a position not overlapping the rotation range of the crank web when viewed in any direction orthogonal to the direction of the crank rotational axis (Ac), characterized in that a conversion contact portion where the relative moving member and the rotating member contact each other, is provided in the lubrication space formed by the crankcase member to be exposed to the lubrication space. an engine main body unit which includes a crankcase member forming a lubrication space in which lubricant is provided and a crankshaft member provided in the lubrication space and including a crank web; and an electronically-controlled continuously variable transmission apparatus including: a continuously variable transmission including: a primary pulley which is rotatable in accordance with rotation of the crankshaft member and includes at least one primary movable sheave movable in a rotational axis direction; a secondary pulley; a dry belt which is wound onto the primary pulley and the secondary pulley and has a slide portion which is in contact with the primary pulley and the secondary pulley and is not lubricated by the lubricant; and a dry belt casing which forms a dry space in which the primary pulley, the secondary pulley, and the dry belt are provided, a primary rotational axis (Ap) which is the rotational axis of the at least one primary movable sheave being on the same line as or being parallel to a crank rotational axis (Ac) which is the rotational axis of the crankshaft member; a rotational force transmission mechanism which is configured to transmit a rotational force of an electric motor; and a rotational force conversion mechanism configured to move the at least one primary movable sheave in the direction of the primary rotational axis (Ap) and includes (a) a rotating member which is rotatable by the rotational force transmitted from the rotational force transmission mechanism and (b) a relative moving member which is in contact with the rotating member and is movable by the rotational force of the rotating member in the direction of the primary rotational axis (Ap) relative to the rotating member, a continuously variable transmission including: a primary pulley which is rotatable in accordance with rotation of the crankshaft member and includes at least one primary movable sheave movable in a rotational axis direction; a secondary pulley; a dry belt which is wound onto the primary pulley and the secondary pulley and has a slide portion which is in contact with the primary pulley and the secondary pulley and is not lubricated by the lubricant; and a dry belt casing which forms a dry space in which the primary pulley, the secondary pulley, and the dry belt are provided, a primary rotational axis (Ap) which is the rotational axis of the at least one primary movable sheave being on the same line as or being parallel to a crank rotational axis (Ac) which is the rotational axis of the crankshaft member; a rotational force transmission mechanism which is configured to transmit a rotational force of an electric motor; and a rotational force conversion mechanism configured to move the at least one primary movable sheave in the direction of the primary rotational axis (Ap) and includes (a) a rotating member which is rotatable by the rotational force transmitted from the rotational force transmission mechanism and (b) a relative moving member which is in contact with the rotating member and is movable by the rotational force of the rotating member in the direction of the primary rotational axis (Ap) relative to the rotating member,