A duplex stainless clad steel plate in which a duplex stainless steel plate as a cladding metal is bonded or joined to one or both surfaces of a base steel plate, wherein the base steel plate comprises a first chemical composition containing, in mass%, C: 0.06 % to 0.25 %, Si: 0.05 % to 0.50 %, Mn: 0.70 % to 1.60 %, P: 0.030 % or less, S: 0.010 % or less, Al: 0.005 % to 0.100 %, Mo: 0.01 % to 0.15 %, Nb: 0.010 % to 0.040 %, Ti: less than 0.005 %, and N: 0.0010 % to 0.0100 %, optionally, in mass%, at least one selected from the group consisting of Cu: 0.50 % or less, Ni: 0.50 % or less, Cr: 0.40 % or less, and V: 0.050 % or less, with the balance being Fe and inevitable impurities, in a range such that Nb/N is 3.0 or more and Ceq represented by the following Expression is 0.35 to 0.45: Ceq = C + Mn / 6 + Cu + Ni / 15 + Cr + Mo + V / 5 where the symbol of each element indicates the content in mass% of the element, and any element not contained is calculated as 0, the duplex stainless steel plate comprises: a second chemical composition containing, in mass%, C: 0.030 % or less, Si: 1.00 % or less, Mn: 2.00 % or less, P: 0.0400 % or less, S: 0.0100 % or less, Ni: 4.50 % to 7.00 %, Cr: 21.0 % to 24.0 %, Mo: 2.5 % to 3.5 %, and N: 0.08 % to 0.20 %, optionally, in mass%, at least one selected from the group consisting of Cu: 1.50 % or less, W: 1.50 % or less, Co: 1.50 % or less, Ti: 0.25 % or less, and Nb: 0.25 % or less, with the balance being Fe and inevitable impurities, in a range such that PI defined by the following Expression is 33.0 to 38.0: PI = Cr + 3.3 Mo + 16 N where the symbol of each element indicates the content in mass% of the element; and a microstructure containing a ferrite phase in an area fraction of 35 % to 65 %, and in the microstructure, an amount of precipitated Cr is 1.00 % or less and an amount of precipitated Mo is 0.50 % or less. the base steel plate comprises a first chemical composition containing, in mass%, C: 0.06 % to 0.25 %, Si: 0.05 % to 0.50 %, Mn: 0.70 % to 1.60 %, P: 0.030 % or less, S: 0.010 % or less, Al: 0.005 % to 0.100 %, Mo: 0.01 % to 0.15 %, Nb: 0.010 % to 0.040 %, Ti: less than 0.005 %, and N: 0.0010 % to 0.0100 %, optionally, in mass%, at least one selected from the group consisting of Cu: 0.50 % or less, Ni: 0.50 % or less, Cr: 0.40 % or less, and V: 0.050 % or less, with the balance being Fe and inevitable impurities, in a range such that Nb/N is 3.0 or more and Ceq represented by the following Expression is 0.35 to 0.45: Ceq = C + Mn / 6 + Cu + Ni / 15 + Cr + Mo + V / 5 where the symbol of each element indicates the content in mass% of the element, and any element not contained is calculated as 0, the duplex stainless steel plate comprises: a second chemical composition containing, in mass%, C: 0.030 % or less, Si: 1.00 % or less, Mn: 2.00 % or less, P: 0.0400 % or less, S: 0.0100 % or less, Ni: 4.50 % to 7.00 %, Cr: 21.0 % to 24.0 %, Mo: 2.5 % to 3.5 %, and N: 0.08 % to 0.20 %, optionally, in mass%, at least one selected from the group consisting of Cu: 1.50 % or less, W: 1.50 % or less, Co: 1.50 % or less, Ti: 0.25 % or less, and Nb: 0.25 % or less, with the balance being Fe and inevitable impurities, in a range such that PI defined by the following Expression is 33.0 to 38.0: PI = Cr + 3.3 Mo + 16 N where the symbol of each element indicates the content in mass% of the element; and a microstructure containing a ferrite phase in an area fraction of 35 % to 65 %, and a second chemical composition containing, in mass%, C: 0.030 % or less, Si: 1.00 % or less, Mn: 2.00 % or less, P: 0.0400 % or less, S: 0.0100 % or less, Ni: 4.50 % to 7.00 %, Cr: 21.0 % to 24.0 %, Mo: 2.5 % to 3.5 %, and N: 0.08 % to 0.20 %, optionally, in mass%, at least one selected from the group consisting of Cu: 1.50 % or less, W: 1.50 % or less, Co: 1.50 % or less, Ti: 0.25 % or less, and Nb: 0.25 % or less, with the balance being Fe and inevitable impurities, in a range such that PI defined by the following Expression is 33.0 to 38.0: PI = Cr + 3.3 Mo + 16 N where the symbol of each element indicates the content in mass% of the element; and a microstructure containing a ferrite phase in an area fraction of 35 % to 65 %, and in the microstructure, an amount of precipitated Cr is 1.00 % or less and an amount of precipitated Mo is 0.50 % or less.