A high-strength hot dip galvannealed steel sheet having high powdering resistance, characterized in that the hot dip galvannealed steel sheet has a Fe-Zn alloy plated layer on at least one side of a basis steel sheet, and a region in said Fe-Zn alloy plated layer in which 0.40 ≥ A1 (atom %)/Zn (atom %) ≥ 0.10 is present in a thickness of 300 Å or more and 1500 Å or less from the surface of the plated layer along the depth direction of the plated layer, wherein the plated layer contains Si-based oxide and contains Si in an amount of 0.1% by mass or more, the amount of plating is 20 g/m 2 or more and 60 g/m 2 or less, and the basis steel sheet is either: (i) a basis steel sheet comprising the following components: C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 0.5 to 3.5%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Si + Al: 0.6 to 3.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3% or less, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and iron and inevitable impurities as the remainder; wherein the steel structure in the basis steel sheet is a composite structure comprising: ferrite: 90% by volume or less bainitic ferrite: 90% by volume or less ferrite and bainitic ferrite in total: 70% by volume or more, and retained austenite: 5% by volume or more; or (ii) a basis steel sheet comprising the following components: C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 1.0 to 3.0%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3%, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and iron and inevitable impurities as the remainder; wherein the metal structure of the basis steel sheet is a composite structure comprising: ferrite: 5 to 90% by volume, martensite: 5 to 90% by volume, ferrite and martensite in total: 70% by volume or more, and retained austenite: 10% by volume or less. (i) a basis steel sheet comprising the following components: C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 0.5 to 3.5%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Si + Al: 0.6 to 3.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3% or less, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and iron and inevitable impurities as the remainder; wherein the steel structure in the basis steel sheet is a composite structure comprising: ferrite: 90% by volume or less bainitic ferrite: 90% by volume or less ferrite and bainitic ferrite in total: 70% by volume or more, and retained austenite: 5% by volume or more; or C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 0.5 to 3.5%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Si + Al: 0.6 to 3.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3% or less, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and ferrite: 90% by volume or less bainitic ferrite: 90% by volume or less ferrite and bainitic ferrite in total: 70% by volume or more, and retained austenite: 5% by volume or more; or (ii) a basis steel sheet comprising the following components: C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 1.0 to 3.0%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3%, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and iron and inevitable impurities as the remainder; wherein the metal structure of the basis steel sheet is a composite structure comprising: ferrite: 5 to 90% by volume, martensite: 5 to 90% by volume, ferrite and martensite in total: 70% by volume or more, and retained austenite: 10% by volume or less. C: 0.05 to 0.3%, Si: 0.5 to 3.0%, Mn: 1.0 to 3.0%, P: 0.03% or less (not including 0%), S: 0.01% or less (not including 0%), A1: 0.005 to 2.5%, Cr: 0 to 1%, Mo: 0 to 1%, Ti: 0 to 0.2%, Nb: 0 to 0.2%, V: 0 to 0.3%, Cu: 0 to 3%, Ni: 0 to 3%, B: 0 to 0.01%, Ca: 0 to 0.01%, and ferrite: 5 to 90% by volume, martensite: 5 to 90% by volume, ferrite and martensite in total: 70% by volume or more, and retained austenite: 10% by volume or less.