An engine exhaust manifold comprising: an exhaust inlet part corresponding to a plurality of exhaust ports (p1, p2, p3, p4); one exhaust outlet part; and an exhaust confluence part to collect exhaust gas from the exhaust inlet part and send to the exhaust outlet part, the engine exhaust manifold being formed with a gas lead-out part to take out EGR gas and an EGR passage part to send the EGR gas toward an intake passage, wherein the EGR passage part is formed at one end part in a longitudinal direction of the exhaust confluence part, and the gas lead-out part is formed at another end part in the longitudinal direction of the exhaust confluence part, wherein, at starting ends of the gas lead-out part and the EGR passage part, mounting parts (22, 23) to mount an EGR passage member connecting both the gas lead-out part and the EGR passage part are provided, wherein the mounting part of the EGR passage part is a flange part to be able to bolt the EGR passage member, and the flange part is continuous with the exhaust confluence part, wherein the exhaust outlet part is provided at a position other than a central part in the longitudinal direction of the exhaust confluence part, the exhaust outlet part is formed in a state of being taken out from the exhaust confluence part in a direction intersecting the longitudinal direction, and having a curved detour shape, wherein an internal threaded part enabling an exhaust introduction part of a supercharger to be connected by bolting is formed in the exhaust outlet part, and an exhaust outlet passage formed in the exhaust outlet part is formed in a curved shape that detours the internal threaded part, wherein, the longitudinal direction of the exhaust confluence part is a front-rear direction, and in the exhaust outlet passage, a width of a portion that detours the internal threaded part is expanded in the front-rear direction intersecting a detour direction so that a decrease in a cross-sectional area of the exhaust outlet passage at the portion that detours the internal threaded part can be eliminated or suppressed, and wherein expansion of a width in the front-rear direction of the portion that detours is made by providing an angle at a boundary between the exhaust outlet passage and an exhaust confluence passage formed in the exhaust confluence part. an exhaust inlet part corresponding to a plurality of exhaust ports (p1, p2, p3, p4); one exhaust outlet part; and an exhaust confluence part to collect exhaust gas from the exhaust inlet part and send to the exhaust outlet part, the engine exhaust manifold being formed with a gas lead-out part to take out EGR gas and an EGR passage part to send the EGR gas toward an intake passage, wherein the EGR passage part is formed at one end part in a longitudinal direction of the exhaust confluence part, and the gas lead-out part is formed at another end part in the longitudinal direction of the exhaust confluence part, wherein, at starting ends of the gas lead-out part and the EGR passage part, mounting parts (22, 23) to mount an EGR passage member connecting both the gas lead-out part and the EGR passage part are provided, wherein the mounting part of the EGR passage part is a flange part to be able to bolt the EGR passage member, and the flange part is continuous with the exhaust confluence part, wherein the exhaust outlet part is provided at a position other than a central part in the longitudinal direction of the exhaust confluence part, the exhaust outlet part is formed in a state of being taken out from the exhaust confluence part in a direction intersecting the longitudinal direction, and having a curved detour shape, wherein an internal threaded part enabling an exhaust introduction part of a supercharger to be connected by bolting is formed in the exhaust outlet part, and an exhaust outlet passage formed in the exhaust outlet part is formed in a curved shape that detours the internal threaded part, wherein, the longitudinal direction of the exhaust confluence part is a front-rear direction, and in the exhaust outlet passage, a width of a portion that detours the internal threaded part is expanded in the front-rear direction intersecting a detour direction so that a decrease in a cross-sectional area of the exhaust outlet passage at the portion that detours the internal threaded part can be eliminated or suppressed, and wherein expansion of a width in the front-rear direction of the portion that detours is made by providing an angle at a boundary between the exhaust outlet passage and an exhaust confluence passage formed in the exhaust confluence part.