A vehicle comprising a multi-cylinder engine mounted on the vehicle, the multi-cylinder engine comprising: plural cylinders that are arranged in an array; plural intake ports that respectively communicate with the plural cylinders ; and an air intake passage that is connected to the intake ports , wherein the air intake passage has: plural independent passages that are respectively connected to the plural intake ports ; a surge tank , to which upstream end portions of the plural independent passages are connected so as to be arranged in line according to an alignment order of the corresponding intake ports ; and an upstream passage that is connected to the surge tank so as to introduce gas into the surge tank , a bottom surface of the surge tank has such a shape that the bottom surface is positioned below a lower surface at an upstream end of each of the plural independent passages and comes closer to the lower surface at the upstream end of each of the plural independent passages in a vertical direction as separating from a connected portion between the surge tank and the upstream passage in a cylinder array direction, and when seen in a perpendicular cross section to the cylinder array direction, the surge tank is formed with an inclined surface that is interposed between the bottom surface of said surge tank and the lower surface at the upstream end of the independent passage and that is inclined upward from the surge tank side to the independent passage side, characterized in that the inclined surface is formed to be more gradually inclined as separating from the connected portion between the surge tank and the upstream passage in the cylinder array direction. plural cylinders that are arranged in an array; plural intake ports that respectively communicate with the plural cylinders ; and an air intake passage that is connected to the intake ports , wherein the air intake passage has: plural independent passages that are respectively connected to the plural intake ports ; a surge tank , to which upstream end portions of the plural independent passages are connected so as to be arranged in line according to an alignment order of the corresponding intake ports ; and an upstream passage that is connected to the surge tank so as to introduce gas into the surge tank , plural independent passages that are respectively connected to the plural intake ports ; a surge tank , to which upstream end portions of the plural independent passages are connected so as to be arranged in line according to an alignment order of the corresponding intake ports ; and an upstream passage that is connected to the surge tank so as to introduce gas into the surge tank , a bottom surface of the surge tank has such a shape that the bottom surface is positioned below a lower surface at an upstream end of each of the plural independent passages and comes closer to the lower surface at the upstream end of each of the plural independent passages in a vertical direction as separating from a connected portion between the surge tank and the upstream passage in a cylinder array direction, and when seen in a perpendicular cross section to the cylinder array direction, the surge tank is formed with an inclined surface that is interposed between the bottom surface of said surge tank and the lower surface at the upstream end of the independent passage and that is inclined upward from the surge tank side to the independent passage side, characterized in that the inclined surface is formed to be more gradually inclined as separating from the connected portion between the surge tank and the upstream passage in the cylinder array direction. <EOS>