An embossed pipe manufacturing apparatus capable of easily welding opposite side surfaces of an embossed metal sheet, the embossed pipe manufacturing apparatus comprising: an uncoiler configured to provide a flat metal sheet; a centering guide roller configured to guide the flat metal sheet supplied from the uncoiler to an embossing machine located at a rear thereof; the embossing machine being configured to emboss the flat metal sheet supplied via the centering guide roller in order to form an embossed metal sheet; and a pipe mill configured to curve and round the embossed metal sheet supplied through the embossing machine in order to manufacture an embossed pipe having a weld seam portion formed in a longitudinal direction, the pipe mill also being configured to weld the weld seam portion of the embossed pipe in order to complete the embossed pipe, wherein the embossing machine comprises: an embossing press roller comprising an upper roller having a relief embossing pattern formed thereon and a lower roller having an intaglio embossing pattern formed thereon, the upper roller and the lower roller being configured to be rotated in a state of being engaged with each other; a frame unit defining an outer framework of the embossing machine, the frame unit being configured to support the embossing press roller; and a hydraulic cylinder installed at an upper end of the frame unit, wherein the upper roller comprises: a roller body; rotary shafts formed at centers of opposite side surfaces of the roller body; a relief embossing pattern unit formed on a surface of the roller body; and band-shaped grooves formed on the surface of the roller body in a rotational direction of the roller, the relief embossing pattern unit being higher than the band-shaped grooves, in order to partition the relief embossing pattern unit at predetermined intervals, wherein the lower roller comprises: a roller body; rotary shafts formed at centers of opposite side surfaces of the roller body; an intaglio embossing pattern unit formed on the surface of the roller body; and band-shaped protrusions formed on the surface of the roller body in the rotational direction of the roller, the intaglio embossing pattern unit being lower than the band-shaped protrusions, in order to partition the intaglio embossing pattern unit at predetermined intervals, the protrusions being configured to be inserted into the grooves, wherein the upper roller further comprises first left and right ends (315, 316) formed along opposite side edges of the roller body, the relief embossing pattern unit being higher than the first left and right ends (315, 316), and wherein the lower roller further comprises second left and right ends (325, 326) formed along opposite side edges of the roller body, the intaglio embossing pattern unit being lower than the second left and right ends (325, 326), characterized in that each of the grooves has a width of 2.0 mm or less and a width of each of the first left and right ends (315, 316) formed at the opposite side ends of the upper roller is set to 1/2 the width of the grooves so that, in use, the weld seam portion has a width of 2.0 mm or less. the embossing machine comprises: an embossing press roller comprising an upper roller having a relief embossing pattern formed thereon and a lower roller having an intaglio embossing pattern formed thereon, the upper roller and the lower roller being configured to be rotated in a state of being engaged with each other; a frame unit defining an outer framework of the embossing machine, the frame unit being configured to support the embossing press roller; and a hydraulic cylinder installed at an upper end of the frame unit, wherein the upper roller comprises: a roller body; rotary shafts formed at centers of opposite side surfaces of the roller body; a relief embossing pattern unit formed on a surface of the roller body; and band-shaped grooves formed on the surface of the roller body in a rotational direction of the roller, the relief embossing pattern unit being higher than the band-shaped grooves, in order to partition the relief embossing pattern unit at predetermined intervals, wherein the lower roller comprises: a roller body; rotary shafts formed at centers of opposite side surfaces of the roller body; an intaglio embossing pattern unit formed on the surface of the roller body; and band-shaped protrusions formed on the surface of the roller body in the rotational direction of the roller, the intaglio embossing pattern unit being lower than the band-shaped protrusions, in order to partition the intaglio embossing pattern unit at predetermined intervals, the protrusions being configured to be inserted into the grooves, wherein the upper roller further comprises first left and right ends (315, 316) formed along opposite side edges of the roller body, the relief embossing pattern unit being higher than the first left and right ends (315, 316), and wherein the lower roller further comprises second left and right ends (325, 326) formed along opposite side edges of the roller body, the intaglio embossing pattern unit being lower than the second left and right ends (325, 326), characterized in that each of the grooves has a width of 2.0 mm or less and a width of each of the first left and right ends (315, 316) formed at the opposite side ends of the upper roller is set to 1/2 the width of the grooves so that, in use, the weld seam portion has a width of 2.0 mm or less.