Provided is a nickel brazing material having a melting temperature of 1000° C. or less and acid corrosion resistance. It includes 15.0 to 30.0 mass % of Cr, 6.0 to 18.0 mass % of Cu, 1.0 to 5.0 mass % of Mo. 5.0 to 7.0 mass % of P, 3.0 to 5.0 mass % of Si, and 0.1 to 1.5 mass % of Sn, the remainder being Ni and inevitable impurities. and the total of Si and P being 9.5 mass % to 11.0 mass %. It can include additional element selected from the group consisting of Co, Fe, Mn, C, B, Al, and Ti. The content of Co is 5.0 mass % or less, the content of Fe is 5.0 mass % or less, the content of Mn is 3.0 mass % or less, the total content of C, B, Al, and Ti is 0.5 mass % or less, and the total content of these elements is 10.0 mass % or less.