A ferritic stainless steel comprising a chemical composition containing, in mass%: 0.003% to 0.020% of C; 0.05% to 1.00% of Si; 0.10% to 0.50% of Mn; 0.005% or greater to 0.04% or less of P; 0.0005% or more to 0.01% or less of S; 16.0% to 25.0% of Cr; 0.05% to 0.60% of Ni; 0.25% to 0.45% of Nb; 0.005% to 0.15% of Al; 0.005% to 0.030% of N; and at least one selected from 0.50% to 2.50% of Mo and 0.05% to 0.80% of Cu, and optionally, in mass%, one or more of: 0.01% to 0.20% of V; 0.0003% to 0.0030% of Ca; and 0.0003% to 0.0030% of B; the balance being Fe and incidental impurities, wherein a nitrogen-enriched layer is present in a region spanning for a depth of 0.005 μm to 0.05 μm in the depth direction from the surface of the steel, which has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 μm of a surface of the steel, calculated by measuring nitrogen concentration in the steel in a depth direction by glow discharge optical emission spectroscopy, dividing a maximum value for nitrogen concentration at a depth of within 0.05 μm of the steel surface by a measured value for nitrogen concentration at a depth of 0.50 μm, and multiplying the resultant value by the nitrogen concentration of the steel obtained through chemical analysis. 0.003% to 0.020% of C; 0.05% to 1.00% of Si; 0.10% to 0.50% of Mn; 0.005% or greater to 0.04% or less of P; 0.0005% or more to 0.01% or less of S; 16.0% to 25.0% of Cr; 0.05% to 0.60% of Ni; 0.25% to 0.45% of Nb; 0.005% to 0.15% of Al; 0.005% to 0.030% of N; and at least one selected from 0.50% to 2.50% of Mo and 0.05% to 0.80% of Cu, and optionally, in mass%, one or more of: 0.01% to 0.20% of V; 0.0003% to 0.0030% of Ca; and 0.0003% to 0.0030% of B; the balance being Fe and incidental impurities, wherein a nitrogen-enriched layer is present in a region spanning for a depth of 0.005 μm to 0.05 μm in the depth direction from the surface of the steel, which has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 μm of a surface of the steel, calculated by measuring nitrogen concentration in the steel in a depth direction by glow discharge optical emission spectroscopy, dividing a maximum value for nitrogen concentration at a depth of within 0.05 μm of the steel surface by a measured value for nitrogen concentration at a depth of 0.50 μm, and multiplying the resultant value by the nitrogen concentration of the steel obtained through chemical analysis. 0.01% to 0.20% of V; 0.0003% to 0.0030% of Ca; and 0.0003% to 0.0030% of B; the balance being Fe and incidental impurities, wherein a nitrogen-enriched layer is present in a region spanning for a depth of 0.005 μm to 0.05 μm in the depth direction from the surface of the steel, which has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 μm of a surface of the steel, calculated by measuring nitrogen concentration in the steel in a depth direction by glow discharge optical emission spectroscopy, dividing a maximum value for nitrogen concentration at a depth of within 0.05 μm of the steel surface by a measured value for nitrogen concentration at a depth of 0.50 μm, and multiplying the resultant value by the nitrogen concentration of the steel obtained through chemical analysis.