A vehicle, comprising: an engine; an engine cover (4, 5) that covers an upper side and a lateral side of the engine; and an air intake structure, wherein the air intake structure includes an air cleaner disposed on the outer side of the engine cover (4, 5), and a cross component that crosses an inner side and an outer side of the engine cover (4, 5), one end of the cross component is attached to the air cleaner and the other end of the cross component is attached to an air intake resonator, the engine cover (4, 5) has a through-hole (4d, 13b) through which the cross component passes, the cross component is a flexible hose or a flexible pipe and is formed by integrating a body part extending in a direction in which the cross component crosses with a diameter enlarged part having a diameter larger than the body part, an outer peripheral part of the diameter enlarged part makes close contact with an inner peripheral surface (4e, 13a) of the through-hole (4d, 13b) of the engine cover (4, 5), the engine cover (4, 5) includes an upper engine cover that covers the upper side of the engine and an upper portion of the lateral side of the engine and a lateral engine cover that covers a lower portion of the lateral side of the engine, both the upper engine cover and the lateral engine cover have heat retaining members (40, 130), and the through-hole (4d, 13b) is provided at a boundary portion between the upper engine cover and the lateral engine cover, when the cross component is seen on a cross section taken along an axis related to extension of the body part, the diameter enlarged part has a tapered part obliquely extending from the outer side to the inner side of the engine cover (4, 5) and a contact part that has one end part continued with an end portion of the tapered part and the other end part that is a free end and makes close contact with the inner peripheral surface (4e, 13a) of the through-hole (4d, 13b) as the outer peripheral part, the lateral engine cover has a cross part lower cover that is disposed below a portion through which the cross component crosses and separated from other portions, the air cleaner is fixed to a vehicle body and the cross part lower cover is fixed to the air cleaner. an engine; an engine cover (4, 5) that covers an upper side and a lateral side of the engine; and an air intake structure, wherein the air intake structure includes an air cleaner disposed on the outer side of the engine cover (4, 5), and a cross component that crosses an inner side and an outer side of the engine cover (4, 5), one end of the cross component is attached to the air cleaner and the other end of the cross component is attached to an air intake resonator, the engine cover (4, 5) has a through-hole (4d, 13b) through which the cross component passes, the cross component is a flexible hose or a flexible pipe and is formed by integrating a body part extending in a direction in which the cross component crosses with a diameter enlarged part having a diameter larger than the body part, an outer peripheral part of the diameter enlarged part makes close contact with an inner peripheral surface (4e, 13a) of the through-hole (4d, 13b) of the engine cover (4, 5), the engine cover (4, 5) includes an upper engine cover that covers the upper side of the engine and an upper portion of the lateral side of the engine and a lateral engine cover that covers a lower portion of the lateral side of the engine, both the upper engine cover and the lateral engine cover have heat retaining members (40, 130), and the through-hole (4d, 13b) is provided at a boundary portion between the upper engine cover and the lateral engine cover, when the cross component is seen on a cross section taken along an axis related to extension of the body part, the diameter enlarged part has a tapered part obliquely extending from the outer side to the inner side of the engine cover (4, 5) and a contact part that has one end part continued with an end portion of the tapered part and the other end part that is a free end and makes close contact with the inner peripheral surface (4e, 13a) of the through-hole (4d, 13b) as the outer peripheral part, the lateral engine cover has a cross part lower cover that is disposed below a portion through which the cross component crosses and separated from other portions, the air cleaner is fixed to a vehicle body and the cross part lower cover is fixed to the air cleaner.