A metal powder for powder metallurgy, comprising particles, which consist of: Fe as a principal component, Cr in a proportion of 10% by mass or more and 30% by mass or less, C in a proportion of 0.1% by mass or more and 2% by mass or less, and Si in a proportion of 0.2% by mass or more and 1.5% by mass or less, optionally a Mn content of 0.01-1.25% by mass, optionally a Ni content of 0.05-0.6% by mass, and optionally at least one of the elements: Mo, Pb, S, and Al, wherein a Mo content in the particle is 0.2% by mass or more and 0.8% by mass or less, and/or a Pb content in the particle is 0.03% by mass or more and 0.5% by mass or less, and/or a S content in the particle is 0.5% by mass or less, and/or an Al content in the particle is 0.5% by mass or less, and/or an oxygen content in the metal powder is 0.8% by mass or less, and further optionally B, Se, Te, Pd, W, Co, N, Cu with an individual content of each of said elements being less than 0.1% by mass and the total content of said elements being less than 0.2% by mass, impurity elements such that the content of each of the impurity elements is less than the content of each of Fe, Cr, Si, the first element, and the second element, and the content of each of the impurity elements is less than 0.03% by mass and the total content of the impurity elements is less than 0.3% by mass, and in which when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta, and having a higher group number in the periodic table than that of the first element or having the same group number in the periodic table as that of the first element and a higher period number in the periodic table than that of the first element is defined as a second element, the first element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less, and the second element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less, wherein the number of crystals in the cross section of the particle is 1 or more and 5 or less on average. Fe as a principal component, Cr in a proportion of 10% by mass or more and 30% by mass or less, C in a proportion of 0.1% by mass or more and 2% by mass or less, and Si in a proportion of 0.2% by mass or more and 1.5% by mass or less, optionally a Mn content of 0.01-1.25% by mass, optionally a Ni content of 0.05-0.6% by mass, and optionally at least one of the elements: Mo, Pb, S, and Al, wherein a Mo content in the particle is 0.2% by mass or more and 0.8% by mass or less, and/or a Pb content in the particle is 0.03% by mass or more and 0.5% by mass or less, and/or a S content in the particle is 0.5% by mass or less, and/or an Al content in the particle is 0.5% by mass or less, and/or an oxygen content in the metal powder is 0.8% by mass or less, and further optionally B, Se, Te, Pd, W, Co, N, Cu with an individual content of each of said elements being less than 0.1% by mass and the total content of said elements being less than 0.2% by mass, impurity elements such that the content of each of the impurity elements is less than the content of each of Fe, Cr, Si, the first element, and the second element, and the content of each of the impurity elements is less than 0.03% by mass and the total content of the impurity elements is less than 0.3% by mass, and in which when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta, and having a higher group number in the periodic table than that of the first element or having the same group number in the periodic table as that of the first element and a higher period number in the periodic table than that of the first element is defined as a second element, the first element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less, and the second element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less, wherein the number of crystals in the cross section of the particle is 1 or more and 5 or less on average.