A structure comprising Zn-based plated steel sheets and an arc welded joint joining them, wherein the arc welded joint is obtained by the following method of arc-welding Zn-based plated steel sheets, characterized in that a welding section of the arc welded joint formed by subjecting an overlaid portion of the steel sheets to the method of arc welding along a welding line comprises a starting end portion obtained by a first step; a terminal end portion formed as a welding section by performing welding according to a third step after performing welding according to a second step; and a central portion sandwiched between the starting end portion and the terminal end portion; wherein the starting end portion corresponding to a welding section after the first step is a region covering 10 to 40% of the entirety of a welding length, and the terminal end portion corresponding to a welding section after the third step is a region covering 10 to 20% of the entirety of the welding length; wherein a blowhole occupancy over the entirety of the welding length is less than 30%; wherein the blowhole occupancy is defined through the following formula: blowhole occupancy (%) = (Total length of blowholes) / (Length of weld bead) ∗ 100 wherein the method of arc-welding comprises: providing an inter-sheet gap within a range of 0.2 to 1.5 mm; performing welding by moving a welding means along the overlaid portion of the steel sheets to be welded and joined; the first step of moving the welding means at a first welding speed from a welding start point, and applying a first welding heat input to perform welding; the second step of, after the first step, moving the welding means at a second welding speed, and applying a second welding heat input to perform welding; and the third step of, after the second step, stopping the movement of the welding means, and performing welding for 0.1 to 2 seconds at a position where the welding means is stopped, wherein the first step includes the starting end portion welded under conditions where the first welding speed is smaller than the second welding speed, and the first welding heat input is larger than the second welding heat input, and the third step includes performing welding at a welding current and a welding voltage lower than those used in the second step. providing an inter-sheet gap within a range of 0.2 to 1.5 mm; performing welding by moving a welding means along the overlaid portion of the steel sheets to be welded and joined; the first step of moving the welding means at a first welding speed from a welding start point, and applying a first welding heat input to perform welding; the second step of, after the first step, moving the welding means at a second welding speed, and applying a second welding heat input to perform welding; and the third step of, after the second step, stopping the movement of the welding means, and performing welding for 0.1 to 2 seconds at a position where the welding means is stopped, wherein the first step includes the starting end portion welded under conditions where the first welding speed is smaller than the second welding speed, and the first welding heat input is larger than the second welding heat input, and the third step includes performing welding at a welding current and a welding voltage lower than those used in the second step.