A clad steel plate comprising: a base steel; and a cladding metal made of a corrosion resistant alloy bonded to one surface of the base steel, wherein the corrosion resistant alloy is a nickel base alloy or austenitic stainless steel; wherein the base steel has a chemical composition containing, in mass%, C: 0.020 % or more and 0.100 % or less, Si: 0.05 % or more and 0.50 % or less, Mn: 0.75 % or more and 1.60 % or less, P: 0.010 % or less, S: 0.0010 % or less, Al: 0.010 % or more and 0.070 % or less, Nb: 0.005 % or more and 0.080 % or less, Ti: 0.005 % or more and 0.030 % or less, N: 0.0010 % or more and 0.0060 % or less, Ca: 0.0005 % or more and 0.0040 % or less, O: 0.0030 % or less, and at least one selected from the group consisting of Cu: 0.01 % or more and 0.50 % or less, Cr: 0.01 % or more and 0.50 % or less, Mo: 0.01 % or more and 0.50 % or less, V: 0.010 % or more and 0.100 % or less, and Ni: 0.01 % or more and 0.50 % or less, so as to satisfy relations given by the following formulas and , with the balance being Fe and inevitable impurities: 1.00 ≤ ACR ≤ 6.00 where ACR is defined by: ACR = Ca − 0.18 + 130 Ca × O / 1.25 S , where [Ca], [O], and [S] respectively represent the contents in mass% of Ca, O, and S in the base steel, and P HIC < 1.000 where P HIC is defined by: P HIC = 4.46 C + 2.37 Mn / 6 + 1.18 Cr + 1.95 Mo + 1.74 V / 5 + 1.74 Cu + 1.7 Ni / 15 + 22.36 P , where [C], [Mn], [Cr], [Mo], [V], [Cu], [Ni], and [P] respectively represent the contents in mass% of C, Mn, Cr, Mo, V, Cu, Ni, and P in the base steel, wherein the base steel has a steel microstructure in which bainite is present in an area fraction of 94 % or more at a 1/2 thickness position in a thickness direction of the base steel, and with an average crystal grain size of 25 μm or less, and wherein shear strength at a bonded interface between the base steel and the cladding metal is 300 MPa or more. a base steel; and a cladding metal made of a corrosion resistant alloy bonded to one surface of the base steel, wherein the corrosion resistant alloy is a nickel base alloy or austenitic stainless steel; wherein the base steel has a chemical composition containing, in mass%, C: 0.020 % or more and 0.100 % or less, Si: 0.05 % or more and 0.50 % or less, Mn: 0.75 % or more and 1.60 % or less, P: 0.010 % or less, S: 0.0010 % or less, Al: 0.010 % or more and 0.070 % or less, Nb: 0.005 % or more and 0.080 % or less, Ti: 0.005 % or more and 0.030 % or less, N: 0.0010 % or more and 0.0060 % or less, Ca: 0.0005 % or more and 0.0040 % or less, O: 0.0030 % or less, and at least one selected from the group consisting of Cu: 0.01 % or more and 0.50 % or less, Cr: 0.01 % or more and 0.50 % or less, Mo: 0.01 % or more and 0.50 % or less, V: 0.010 % or more and 0.100 % or less, and Ni: 0.01 % or more and 0.50 % or less, so as to satisfy relations given by the following formulas and , with the balance being Fe and inevitable impurities: 1.00 ≤ ACR ≤ 6.00 where ACR is defined by: ACR = Ca − 0.18 + 130 Ca × O / 1.25 S , where [Ca], [O], and [S] respectively represent the contents in mass% of Ca, O, and S in the base steel, and P HIC < 1.000 where P HIC is defined by: P HIC = 4.46 C + 2.37 Mn / 6 + 1.18 Cr + 1.95 Mo + 1.74 V / 5 + 1.74 Cu + 1.7 Ni / 15 + 22.36 P , where [C], [Mn], [Cr], [Mo], [V], [Cu], [Ni], and [P] respectively represent the contents in mass% of C, Mn, Cr, Mo, V, Cu, Ni, and P in the base steel, Cu: 0.01 % or more and 0.50 % or less, Cr: 0.01 % or more and 0.50 % or less, Mo: 0.01 % or more and 0.50 % or less, V: 0.010 % or more and 0.100 % or less, and Ni: 0.01 % or more and 0.50 % or less, wherein the base steel has a steel microstructure in which bainite is present in an area fraction of 94 % or more at a 1/2 thickness position in a thickness direction of the base steel, and with an average crystal grain size of 25 μm or less, and wherein shear strength at a bonded interface between the base steel and the cladding metal is 300 MPa or more. <EOS>