A slot die coater (100, 200) for coating an electrode active material slurry on an electrode current collector, comprising: a lower die (110, 210) having a lower outlet (110A, 210A); and an upper die (120, 220) disposed above the lower die (110, 210) and having an upper outlet (120A, 220A), an upper surface of the lower die (110, 210) and a lower surface of the upper die (120, 220) being at least partially in contact with each other to form a sliding surface, and any one of the upper die (120, 220) and the lower die (110, 210) is installed to make a relative movement in a horizontal direction by sliding along the sliding surface. the lower die including a first die block (111, 211), a second die block (112, 212) located above the first die block (111, 211), and a first spacer interposed between the first die block (111, 211) and the second die block (112, 212) so that the lower outlet (110A, 210A) is formed between the first die block (111, 211) and the second die block (112, 212), and the upper die (120, 220) including a third die block (121, 221), a fourth die block (122, 222) located above the third die block (121, 221), and a second spacer interposed between the third die block (121, 221) and the fourth die block (122, 222) so that the upper outlet (120A, 220A) is formed between the third die block (121, 221) and the fourth die block(122, 222) the second die block (112, 212) having a first flat portion (112a, 212b) and a first inclined portion (112b; 212a) extending from the first flat portion (112a, 212b) with a predetermined angle, and the third die block (121, 221) having a second flat portion (121a, 221b) and a second inclined portion extending from the second flat portion (121a, 221b) with a predetermined angle. wherein the first flat portion (112a, 212b) and the second flat portion (121a, 221b) extend in parallel to each other to make a surface contact with each other, and the first inclined portion and the second inclined portion (121b; 221a) extend in parallel to each other to make a surface contact with each other. a lower die (110, 210) having a lower outlet (110A, 210A); and an upper die (120, 220) disposed above the lower die (110, 210) and having an upper outlet (120A, 220A), an upper surface of the lower die (110, 210) and a lower surface of the upper die (120, 220) being at least partially in contact with each other to form a sliding surface, and any one of the upper die (120, 220) and the lower die (110, 210) is installed to make a relative movement in a horizontal direction by sliding along the sliding surface. the lower die including a first die block (111, 211), a second die block (112, 212) located above the first die block (111, 211), and a first spacer interposed between the first die block (111, 211) and the second die block (112, 212) so that the lower outlet (110A, 210A) is formed between the first die block (111, 211) and the second die block (112, 212), and the upper die (120, 220) including a third die block (121, 221), a fourth die block (122, 222) located above the third die block (121, 221), and a second spacer interposed between the third die block (121, 221) and the fourth die block (122, 222) so that the upper outlet (120A, 220A) is formed between the third die block (121, 221) and the fourth die block(122, 222) the second die block (112, 212) having a first flat portion (112a, 212b) and a first inclined portion (112b; 212a) extending from the first flat portion (112a, 212b) with a predetermined angle, and the third die block (121, 221) having a second flat portion (121a, 221b) and a second inclined portion extending from the second flat portion (121a, 221b) with a predetermined angle. wherein the first flat portion (112a, 212b) and the second flat portion (121a, 221b) extend in parallel to each other to make a surface contact with each other, and the first inclined portion and the second inclined portion (121b; 221a) extend in parallel to each other to make a surface contact with each other.