A mutual engagement type intaglio-relief embossing press roller suitable for use in manufacturing an embossed metal pipe, the mutual engagement type intaglio-relief 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 use, in a state of being engaged with each other, the upper roller comprising: a roller body; shafts formed at opposite ends of the roller body; a relief embossing pattern unit formed on a surface of the roller body; first left and right ends (105, 106) formed at opposite side ends of the roller body, the relief embossing pattern unit being higher than the first left and right ends (105, 106); the lower roller comprising: a roller body; shafts formed at opposite ends of the roller body; an intaglio embossing pattern unit formed on a surface of the roller body; and the second left and right ends (205, 206) being formed at opposite side ends of the roller body, the intaglio embossing pattern unit being lower than the second left and right ends (205, 206), wherein the upper roller further comprises 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 band-shaped grooves, in order to partition the relief embossing pattern unit at predetermined intervals, and the lower roller further comprises 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, characterized in that each of the grooves has a width of 1.6 mm or less, and a width of each of the first left and right ends (105, 106) 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 1.6 mm or less, and in that the upper roller further comprises left and right inclined surface formation portions (107, 108) extending from the first left and right ends (105, 106) in a lateral direction so as to be integrally formed therewith, the left and right inclined surface formation portions protruding outwards from points extending from the first left and right ends (105, 106) in an oblique direction, the left and right inclined surface formation portions being rotated, in use, in a state of being engaged with second left and right ends (205, 206) of the lower roller to shape opposite ends of a metal sheet in the oblique direction, and an angle (Θ1) between each of the left and right inclined surface formation portions (107, 108) and a corresponding one of the first left and right ends (105, 106) ranges from 100 to 135 degrees, so that, in use, inclined surfaces formed at the opposite ends of the metal sheet by the left and right inclined surface formation portions (107, 108) are brought into contact with each other to form a weld seam portion having a V-shaped groove, and an interior angle (Θ2) of the V-shaped groove ranges from 20 to 90 degrees. wherein the upper roller further comprises 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 band-shaped grooves, in order to partition the relief embossing pattern unit at predetermined intervals, and the lower roller further comprises 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, characterized in that each of the grooves has a width of 1.6 mm or less, and a width of each of the first left and right ends (105, 106) 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 1.6 mm or less, and in that the upper roller further comprises left and right inclined surface formation portions (107, 108) extending from the first left and right ends (105, 106) in a lateral direction so as to be integrally formed therewith, the left and right inclined surface formation portions protruding outwards from points extending from the first left and right ends (105, 106) in an oblique direction, the left and right inclined surface formation portions being rotated, in use, in a state of being engaged with second left and right ends (205, 206) of the lower roller to shape opposite ends of a metal sheet in the oblique direction, and an angle (Θ1) between each of the left and right inclined surface formation portions (107, 108) and a corresponding one of the first left and right ends (105, 106) ranges from 100 to 135 degrees, so that, in use, inclined surfaces formed at the opposite ends of the metal sheet by the left and right inclined surface formation portions (107, 108) are brought into contact with each other to form a weld seam portion having a V-shaped groove, and an interior angle (Θ2) of the V-shaped groove ranges from 20 to 90 degrees.