A high Al hot-dip Zn--Al--Mg plated steel sheet is obtained by forming on a
steel sheet surface a hot-dip plating layer comprising, in mass %, Al:
more than 10 to 22% and Mg: 1-5%, and, optionally, Ti: 0.002-0.1%, B:
0.001-0.045% and Si: 0.005-0.5%. The plating layer exhibits a metallic
structure of [primary crystal Al phase] mixed in a matrix of
[Al/Zn/Zn.sub.2 Mg ternary eutectic crystal structure]. Substantially no
Zn.sub.11 Mg.sub.2 phase is present in the metallic structure of the
plating layer.
