An intake apparatus for an internal combustion engine that includes a first bank and a second bank, the intake apparatus comprising: an intake pipe including a single fresh air intake pipe portion through which fresh air flows, two branching pipe portions (22, 23) for the first bank and the second bank, and a branching portion that connects the fresh air intake pipe portion to the two branching pipe portions (22, 23); an EGR gas pipe connected to the branching portion and configured to draw EGR gas into the intake pipe; and a partition wall (40; 60; 70; 90) arranged at a periphery of an opening of the EGR gas pipe that opens in the intake pipe, wherein the partition wall (40; 60; 70; 90) is configured to check reversed flow of the EGR gas, which is drawn from the EGR gas pipe into the intake pipe, toward an upstream side with respect to a flow of fresh air, the partition wall (40; 60; 70; 90) is configured to guide the fresh air drawn from the fresh air intake pipe portion to the first bank and the second bank, the partition wall (40; 60; 70; 90) defines an EGR gas accumulation chamber, the EGR gas accumulation chamber being located between the partition wall (40; 60; 70; 90) and an inner surface of intake pipe, which faces the partition wall (40; 60; 70; 90), the EGR gas accumulation chamber is configured to accumulate the EGR gas, which is drawn from the EGR gas pipe, in the intake pipe, the partition wall (40; 60; 70; 90) further defines a first bank flow passage and a second bank flow passage through which the accumulated EGR gas flows out of the EGR gas accumulation chamber in accordance with intake actions of the first bank and the second bank, characterised in that a first effective cross-sectional area of the first bank flow passage and a second effective cross-sectional area of the second bank flow passage are smaller than a flow passage cross-sectional area (S3; S13) of the EGR gas pipe at the opening, the first bank flow passage extends from the opening of the EGR gas pipe toward the branching pipe portion for the first bank and gets smaller toward the branching pipe portion for the first bank, and the second bank flow passage extends from the opening of the EGR gas pipe toward the branching pipe portion for the second bank and gets smaller toward the branching pipe portion for the second bank. an intake pipe including a single fresh air intake pipe portion through which fresh air flows, two branching pipe portions (22, 23) for the first bank and the second bank, and a branching portion that connects the fresh air intake pipe portion to the two branching pipe portions (22, 23); an EGR gas pipe connected to the branching portion and configured to draw EGR gas into the intake pipe; and a partition wall (40; 60; 70; 90) arranged at a periphery of an opening of the EGR gas pipe that opens in the intake pipe, wherein the partition wall (40; 60; 70; 90) is configured to check reversed flow of the EGR gas, which is drawn from the EGR gas pipe into the intake pipe, toward an upstream side with respect to a flow of fresh air, the partition wall (40; 60; 70; 90) is configured to guide the fresh air drawn from the fresh air intake pipe portion to the first bank and the second bank, the partition wall (40; 60; 70; 90) defines an EGR gas accumulation chamber, the EGR gas accumulation chamber being located between the partition wall (40; 60; 70; 90) and an inner surface of intake pipe, which faces the partition wall (40; 60; 70; 90), the EGR gas accumulation chamber is configured to accumulate the EGR gas, which is drawn from the EGR gas pipe, in the intake pipe, the partition wall (40; 60; 70; 90) further defines a first bank flow passage and a second bank flow passage through which the accumulated EGR gas flows out of the EGR gas accumulation chamber in accordance with intake actions of the first bank and the second bank, characterised in that a first effective cross-sectional area of the first bank flow passage and a second effective cross-sectional area of the second bank flow passage are smaller than a flow passage cross-sectional area (S3; S13) of the EGR gas pipe at the opening, the first bank flow passage extends from the opening of the EGR gas pipe toward the branching pipe portion for the first bank and gets smaller toward the branching pipe portion for the first bank, and the second bank flow passage extends from the opening of the EGR gas pipe toward the branching pipe portion for the second bank and gets smaller toward the branching pipe portion for the second bank.