A metal mask for deposition, the metal mask comprising, a deposition region and a non-deposition region, wherein the deposition region includes an effective portion and an ineffective portion, wherein the effective portion includes a plurality of through-holes, wherein the through-holes include: a small surface hole formed on one surface, a large surface hole formed on the other surface opposite to the one surface; and a communication portion in where an inner surface of the small surface hole meets an inner surface of the large surface hole; wherein an island portion is formed between the plurality of large surface holes; wherein a height from the communication portion to the one surface is 3 μm or less, wherein the small surface hole has a hole diameter, wherein through-hole has a diameter at the communication portion, wherein the hole diameter is greater than the diameter of the through-hole, wherein a difference between the hole diameter and the diameter of the through-hole is 0.01 μm to 1.1 μm, wherein an inclination angle (θ1) connecting one end of the small surface hole with respect to the one surface and one end of the communication portion is 70 degrees to 89 degrees, and wherein an inclination curvature radius of an inner surface of the small surface hole with respect to the one surface is 3 μm to 86 μm. a deposition region and a non-deposition region, wherein the deposition region includes an effective portion and an ineffective portion, wherein the effective portion includes a plurality of through-holes, wherein the through-holes include: a small surface hole formed on one surface, a large surface hole formed on the other surface opposite to the one surface; and a communication portion in where an inner surface of the small surface hole meets an inner surface of the large surface hole; wherein an island portion is formed between the plurality of large surface holes; wherein a height from the communication portion to the one surface is 3 μm or less, wherein the small surface hole has a hole diameter, wherein through-hole has a diameter at the communication portion, wherein the hole diameter is greater than the diameter of the through-hole, wherein a difference between the hole diameter and the diameter of the through-hole is 0.01 μm to 1.1 μm, wherein an inclination angle (θ1) connecting one end of the small surface hole with respect to the one surface and one end of the communication portion is 70 degrees to 89 degrees, and wherein an inclination curvature radius of an inner surface of the small surface hole with respect to the one surface is 3 μm to 86 μm. a small surface hole formed on one surface, a large surface hole formed on the other surface opposite to the one surface; and a communication portion in where an inner surface of the small surface hole meets an inner surface of the large surface hole; wherein an island portion is formed between the plurality of large surface holes; wherein a height from the communication portion to the one surface is 3 μm or less, wherein the small surface hole has a hole diameter, wherein through-hole has a diameter at the communication portion, wherein the hole diameter is greater than the diameter of the through-hole, wherein a difference between the hole diameter and the diameter of the through-hole is 0.01 μm to 1.1 μm, wherein an inclination angle (θ1) connecting one end of the small surface hole with respect to the one surface and one end of the communication portion is 70 degrees to 89 degrees, and wherein an inclination curvature radius of an inner surface of the small surface hole with respect to the one surface is 3 μm to 86 μm.