PROBLEM TO BE SOLVED: To provide a technique for accurately measuring a viable cell count of such as lactic acid bacteria and bifidobacteria contained in an oil and fat composition.SOLUTION: The method for measuring a viable cell count includes preparing a powdered cell suspension by mixing the oil and fat composition containing powdered cells with a liquid oil and fat which is a liquid in a temperature condition for growing cells, subsequently preparing a diluent for measurement by diluting the powdered cell suspension with a water-soluble solvent, and measuring the cell count on a medium after adding the diluent for measurement on the medium to culture the cells.
