Hot press member, production method for steel sheet for hot press, and production method for hot press member

A hot pressed member including a steel sheet and a plating layer on a surface of the steel sheet,

• wherein the hot pressed member has a tensile strength of not less than 1,780 MPa,
• wherein ten point height of irregularities Rzjis of a surface of the plating layer is not more than 25 μm, and
• wherein the steel sheet has a chemical composition containing, by mass %, C:
• not less than 0.25% and less than 0.50%, Si:
• not more than 1.5%, Mn:
• not less than 1.1% and not more than 2.4%, P:
• not more than 0.05%, S:
• not more than 0.005%, Al:
• not less than 0.01% and not more than 0.50%, N:
• not more than 0.010%, Sb:
• not less than 0.001% and not more than 0.020%, Nb:
• not less than 0.005% and not more than 0.15%, and Ti:
• not less than 0.005% and not more than 0.15%, with the balance being Fe and inevitable impurities, and
• wherein the steel sheet has, in a region within 50 μm in a sheet thickness direction from a surface of the steel sheet excluding the plating layer, a microstructure in which prior austenite has an average grain size of not more than 7 μm, and a volume fraction of martensite is not less than 90%.