High-strength steel sheet and a manufacturing method thereof excellent in workability and coating bake hardenability

The high-strength steel sheet, a mass%, C: 0.01~0.10%, Si: 0.15% or less, Mn: 0.80~1.80%, P: 0.10% or less, S: 0.015% or less, Al: 0.10~0.80%, Cr: 0.01~1.50%, N: containing 0.0100% or less, and the balance iron and unavoidable impurities, metal tissue consists ferrite and hard second phase, the area ratio of the ferrite is not less than 80%, the area ratio of the hard second phase is 1 to 20% of the ferrite, minute non-recrystallized ferrite rate is less than 10% by area ratio, ferrite grain size is 5 to 20 [mu] m, aspect ratio 1.2 or less of the ferrite grains is 60% or more in all ferrite grain in.