The present invention provides: a phosphate fertilizer which has a high phosphorous solubility in an aqueous citric acid solution and can contribute to the saving of a natural resources for phosphorous or the saving of energy in the production of the fertilizer; and a method for producing phosphate fertilizer. This phosphate fertilizer is produced by burning a mixed raw material comprising sewage sludge and/or a material derived from sewage sludge and a calcium source. This phosphate fertilizer has a CaO content of 35-60 mass%, a SiO2 content of 5-35 mass%, a P2O5 content of 5-35 mass%, and a content of components excluding CaO, SiO2 and P2O5 of 30 mass% or less. The method for producing a phosphate fertilizer comprises: a mixing step of mixing sewage sludge and/or a material derived from sewage sludge with a calcium source and further mixing the resultant mixture with a silica source to produce a mixed raw material; and a burning step of burning the mixed raw material using a burning furnace at 1150-1350 C to produce a burned product as the phosphate fertilizer.