A filter operation unit that performs a multiply-accumulate operation on input data and a filter coefficient group including a plurality of coefficients using Booth's algorithm. The filter operation unit includes: at least two filter multiplier units that multiply the input data and a difference between adjacent filter coefficients in a filter coefficient group to obtain multiplication results; and an adder that adds the multiplication results of the multiplier units adjacent to each other. The filter multiplier units each include: a partial product generation unit that repeatedly generates a partial product according to Booth's algorithm; and an adder that cumulatively adds the partial products generated by the partial product generation unit.