A refrigerator comprising: a main body defining an internal space; and a door provided to open and close the main body, wherein at least one of the main body or the door comprises a vacuum adiabatic body, and wherein the vacuum adiabatic body comprises: a first plate defining at least one portion of a first side of a wall adjacent to the internal space having a first temperature; a second plate defining at least one portion of a second side of the wall adjacent to an external space having a second temperature; and a conductive resistance sheet (60, 63) that connects the first plate to the second plate to define a vacuum space between the first plate and the second plate that has a third temperature between the first temperature and the second temperature, the conductive resistance sheet (60, 63) capable of resisting heat conduction between the first plate and the second plate, wherein the conductive resistance sheet (60, 63) is welded to each of the first and second plates (10, 20) to define first and second welding parts, characterized in that a plurality of regular beads (620, 630) are provided to a surface of each of the welding parts, and wherein each of the regular beads (620, 630) comprises: a parabolic inflection region (621, 631) provided at a center portion of a regular bead (620, 630); a first linear region (622, 632) extending from a first side of the parabolic inflection region (621, 631) and a second linear region extending from a second side of the parabolic inflection region (621, 631); and a first edge region (623, 633) provided at an end of the first linear region (622, 632) opposite the parabolic inflection region (621, 631) and a second edge region provided at an end of the second linear region opposite the parabolic inflection region (621, 631). a main body defining an internal space; and a door provided to open and close the main body, wherein at least one of the main body or the door comprises a vacuum adiabatic body, and wherein the vacuum adiabatic body comprises: a first plate defining at least one portion of a first side of a wall adjacent to the internal space having a first temperature; a second plate defining at least one portion of a second side of the wall adjacent to an external space having a second temperature; and a conductive resistance sheet (60, 63) that connects the first plate to the second plate to define a vacuum space between the first plate and the second plate that has a third temperature between the first temperature and the second temperature, the conductive resistance sheet (60, 63) capable of resisting heat conduction between the first plate and the second plate, wherein the conductive resistance sheet (60, 63) is welded to each of the first and second plates (10, 20) to define first and second welding parts, characterized in that a plurality of regular beads (620, 630) are provided to a surface of each of the welding parts, and wherein each of the regular beads (620, 630) comprises: a parabolic inflection region (621, 631) provided at a center portion of a regular bead (620, 630); a first linear region (622, 632) extending from a first side of the parabolic inflection region (621, 631) and a second linear region extending from a second side of the parabolic inflection region (621, 631); and a first edge region (623, 633) provided at an end of the first linear region (622, 632) opposite the parabolic inflection region (621, 631) and a second edge region provided at an end of the second linear region opposite the parabolic inflection region (621, 631). a first plate defining at least one portion of a first side of a wall adjacent to the internal space having a first temperature; a second plate defining at least one portion of a second side of the wall adjacent to an external space having a second temperature; and a conductive resistance sheet (60, 63) that connects the first plate to the second plate to define a vacuum space between the first plate and the second plate that has a third temperature between the first temperature and the second temperature, the conductive resistance sheet (60, 63) capable of resisting heat conduction between the first plate and the second plate, wherein the conductive resistance sheet (60, 63) is welded to each of the first and second plates (10, 20) to define first and second welding parts, characterized in that a plurality of regular beads (620, 630) are provided to a surface of each of the welding parts, and wherein each of the regular beads (620, 630) comprises: a parabolic inflection region (621, 631) provided at a center portion of a regular bead (620, 630); a first linear region (622, 632) extending from a first side of the parabolic inflection region (621, 631) and a second linear region extending from a second side of the parabolic inflection region (621, 631); and a first edge region (623, 633) provided at an end of the first linear region (622, 632) opposite the parabolic inflection region (621, 631) and a second edge region provided at an end of the second linear region opposite the parabolic inflection region (621, 631). a parabolic inflection region (621, 631) provided at a center portion of a regular bead (620, 630); a first linear region (622, 632) extending from a first side of the parabolic inflection region (621, 631) and a second linear region extending from a second side of the parabolic inflection region (621, 631); and a first edge region (623, 633) provided at an end of the first linear region (622, 632) opposite the parabolic inflection region (621, 631) and a second edge region provided at an end of the second linear region opposite the parabolic inflection region (621, 631).