Exhaust manifold and engine

An exhaust manifold of an engine including a plurality of cylinders, the exhaust manifold comprising:

• a plurality of exhaust pipes through each of which an exhaust gas discharged from each of the cylinders flows;
• and
• a joining pipe coupled to the plurality of exhaust pipes, to which the exhaust gas flowing through each of the exhaust pipes is joined,
• wherein the joining pipe includes a plurality of guide portions provided to respectively correspond to the plurality of exhaust pipes,
• wherein each of the guide portions guides the exhaust gas flowing in from the corresponding exhaust pipe in a flow direction of the exhaust gas flowing through the joining pipe,
• wherein each of the guide portions has an opposing surface provided to be opposed to an outlet of the corresponding exhaust pipe, and
• wherein at least one of the guide portions has a part that is disposed on a downstream side in the flow direction with respect to the outlet.