A cylinder head comprising: a manifold provided inside the cylinder for an exhaust system of an engine; screw holes formed through a fastening face of the cylinder head and an exhaust pipe; outlet cooling channels (4C, 4D) that are provided adjacent to an outlet of a confluence of the manifold, and are disposed between the screw holes and the outlet, such that coolant flows through the outlet cooling channels (4C, 4D); an upper cooling channel that permits a flow of the coolant above the manifold; and a lower cooling channel that permits a flow of the coolant below the manifold, wherein: the screw holes are provided around the outlet, at least one of the screw holes is provided on a lateral side of the outlet, and the outlet cooling channels (4C, 4D) are disposed between the screw holes provided on the lateral side and the outlet, and permit communications between the upper cooling channel and the lower cooling channel; one of the upper cooling channel and the lower cooling channel which are connected to respective inlets of the outlet cooling channels (4C, 4D) comprises a guide section to guide the coolant to the outlet cooling channels (4C, 4D); the coolant in the upper cooling channel and the lower cooling channel flows from one end of a long side direction of the engine to the other end of the long side direction of the engine; and characterized in that the guide section is disposed downstream of a flowing direction of the coolant relative to at least one of the inlets of the outlet cooling channels (4C, 4D), and is configured to separate the flow of the coolant flowing into the main stream and the branched flow, and is configured to protrude for reducing the cross-sectional area of the flow channel of the main stream, as well as guiding the branched flow to at least one of the inlets. a manifold provided inside the cylinder for an exhaust system of an engine; screw holes formed through a fastening face of the cylinder head and an exhaust pipe; outlet cooling channels (4C, 4D) that are provided adjacent to an outlet of a confluence of the manifold, and are disposed between the screw holes and the outlet, such that coolant flows through the outlet cooling channels (4C, 4D); an upper cooling channel that permits a flow of the coolant above the manifold; and a lower cooling channel that permits a flow of the coolant below the manifold, wherein: the screw holes are provided around the outlet, at least one of the screw holes is provided on a lateral side of the outlet, and the outlet cooling channels (4C, 4D) are disposed between the screw holes provided on the lateral side and the outlet, and permit communications between the upper cooling channel and the lower cooling channel; one of the upper cooling channel and the lower cooling channel which are connected to respective inlets of the outlet cooling channels (4C, 4D) comprises a guide section to guide the coolant to the outlet cooling channels (4C, 4D); the coolant in the upper cooling channel and the lower cooling channel flows from one end of a long side direction of the engine to the other end of the long side direction of the engine; and characterized in that the guide section is disposed downstream of a flowing direction of the coolant relative to at least one of the inlets of the outlet cooling channels (4C, 4D), and is configured to separate the flow of the coolant flowing into the main stream and the branched flow, and is configured to protrude for reducing the cross-sectional area of the flow channel of the main stream, as well as guiding the branched flow to at least one of the inlets. the screw holes are provided around the outlet, at least one of the screw holes is provided on a lateral side of the outlet, and the outlet cooling channels (4C, 4D) are disposed between the screw holes provided on the lateral side and the outlet, and permit communications between the upper cooling channel and the lower cooling channel; one of the upper cooling channel and the lower cooling channel which are connected to respective inlets of the outlet cooling channels (4C, 4D) comprises a guide section to guide the coolant to the outlet cooling channels (4C, 4D); the coolant in the upper cooling channel and the lower cooling channel flows from one end of a long side direction of the engine to the other end of the long side direction of the engine; and characterized in that the guide section is disposed downstream of a flowing direction of the coolant relative to at least one of the inlets of the outlet cooling channels (4C, 4D), and is configured to separate the flow of the coolant flowing into the main stream and the branched flow, and is configured to protrude for reducing the cross-sectional area of the flow channel of the main stream, as well as guiding the branched flow to at least one of the inlets.