A slot die coater for coating an electrode active material slurry on an electrode current collector, comprising: a lower die having a lower outlet ; and an upper die disposed above the lower die and having an upper outlet , an upper surface of the lower die and a lower surface of the upper die being at least partially in contact with each other to form a sliding surface, and any one of the upper die and the lower die 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 , a second die block located above the first die block , and a first spacer interposed between the first die block and the second die block so that the lower outlet is formed between the first die block and the second die block , and the upper die including a third die block , a fourth die block located above the third die block , and a second spacer interposed between the third die block and the fourth die block so that the upper outlet is formed between the third die block and the fourth die block the second die block having a first flat portion and a first inclined portion (112b ; 212a) extending from the first flat portion with a predetermined angle, and the third die block having a second flat portion and a second inclined portion extending from the second flat portion with a predetermined angle. wherein the first flat portion and the second flat portion 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 having a lower outlet ; and an upper die disposed above the lower die and having an upper outlet , an upper surface of the lower die and a lower surface of the upper die being at least partially in contact with each other to form a sliding surface, and any one of the upper die and the lower die 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 , a second die block located above the first die block , and a first spacer interposed between the first die block and the second die block so that the lower outlet is formed between the first die block and the second die block , and the upper die including a third die block , a fourth die block located above the third die block , and a second spacer interposed between the third die block and the fourth die block so that the upper outlet is formed between the third die block and the fourth die block the second die block having a first flat portion and a first inclined portion (112b ; 212a) extending from the first flat portion with a predetermined angle, and the third die block having a second flat portion and a second inclined portion extending from the second flat portion with a predetermined angle. wherein the first flat portion and the second flat portion 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. <EOS>