A welded joint 10 is a welded joint 10 in which a first steel sheet 1 and a second steel sheet 2 having a plating layer 4 at least on a part thereof are welded, Expression (1) is satisfied, where La is a length of a grain boundary at which an FeAl phase is present in grain boundaries and Lz is a length of a grain boundary at which an FeZn phase is present in the grain boundaries, and an area ratio of an MgZn phase in the plating layer 4 of a region from a starting point S to a position 1,000 m away from the starting point S is 5% or more.

[00001]$\begin{array}{cc}\mathrm{La}/\left(\mathrm{La}+\mathrm{Lz}\right)10020& \left(1\right)\end{array}$