An internal combustion engine (10, 10A, 10B, 10C) with a turbocharger, comprising: a cylinder block internally including a plurality of cylinders (14, 14a, 14b, 14c, 14d); a cylinder head disposed on top of the cylinder block, and internally including a plurality of exhaust flow passages (18, 18a, 18b, 18c, 18d) through which exhaust air (b) discharged from each of the plurality of cylinders (14, 14a, 14b, 14c, 14d) flows; and the turbocharger including a rotational shaft, a turbine wheel, and a compressor wheel, the turbine wheel being disposed at one end of the rotational shaft, the compressor wheel being disposed at the other end of the rotational shaft, wherein at least the turbine wheel of the turbocharger is arranged inside the cylinder head, wherein the cylinder head internally includes a plurality of scroll passages (28, 28a, 28b, 28c, 28d) for introducing the exhaust air (b) flowing through the plurality of exhaust flow passages (18, 18a, 18b, 18c, 18d) to the turbine wheel, and the plurality of scroll passages (28, 28a, 28b, 28c, 28d) are dispersedly arranged in the periphery of the turbine wheel, and wherein the plurality of scroll passages (28, 28a, 28b, 28c, 28d) including a first scroll passage for introducing the exhaust air (b) from a first range (RA, Ra) in a circumferential direction of the turbine wheel to the turbine wheel, and a second scroll passage for introducing the exhaust air (b) from a second range (RB, Rb), which is different from and does not overlap with the first range (RA, Ra) in the circumferential direction of the turbine wheel, to the turbine wheel, wherein the plurality of cylinders (14, 14a, 14b, 14c, 14d) are arranged along a first direction, and wherein the rotational shaft extends along a second direction orthogonal to the first direction, as seen along an axial direction of each of the cylinders (14, 14a, 14b, 14c, 14d), and is arranged above the plurality of cylinders (14, 14a, 14b, 14c, 14d) in a center part of the plurality of cylinders (14, 14a, 14b, 14c, 14d) in an arrangement direction of the plurality of cylinders (14, 14a, 14b, 14c, 14d). aud a cylinder block internally including a plurality of cylinders (14, 14a, 14b, 14c, 14d); a cylinder head disposed on top of the cylinder block, and internally including a plurality of exhaust flow passages (18, 18a, 18b, 18c, 18d) through which exhaust air (b) discharged from each of the plurality of cylinders (14, 14a, 14b, 14c, 14d) flows; and the turbocharger including a rotational shaft, a turbine wheel, and a compressor wheel, the turbine wheel being disposed at one end of the rotational shaft, the compressor wheel being disposed at the other end of the rotational shaft, wherein at least the turbine wheel of the turbocharger is arranged inside the cylinder head, wherein the cylinder head internally includes a plurality of scroll passages (28, 28a, 28b, 28c, 28d) for introducing the exhaust air (b) flowing through the plurality of exhaust flow passages (18, 18a, 18b, 18c, 18d) to the turbine wheel, and the plurality of scroll passages (28, 28a, 28b, 28c, 28d) are dispersedly arranged in the periphery of the turbine wheel, and wherein the plurality of scroll passages (28, 28a, 28b, 28c, 28d) including a first scroll passage for introducing the exhaust air (b) from a first range (RA, Ra) in a circumferential direction of the turbine wheel to the turbine wheel, and a second scroll passage for introducing the exhaust air (b) from a second range (RB, Rb), which is different from and does not overlap with the first range (RA, Ra) in the circumferential direction of the turbine wheel, to the turbine wheel, wherein the plurality of cylinders (14, 14a, 14b, 14c, 14d) are arranged along a first direction, and wherein the rotational shaft extends along a second direction orthogonal to the first direction, as seen along an axial direction of each of the cylinders (14, 14a, 14b, 14c, 14d), and is arranged above the plurality of cylinders (14, 14a, 14b, 14c, 14d) in a center part of the plurality of cylinders (14, 14a, 14b, 14c, 14d) in an arrangement direction of the plurality of cylinders (14, 14a, 14b, 14c, 14d). aud