A biochemical analysis data producing method includes the steps of selectively storing one of radiation energy and light energy in a plurality of stimulable phosphor layer regions two-dimensionally formed in a support of a stimulable phosphor sheet and spaced apart from each other, moving the stimulable phosphor sheet and a stimulating ray relative to each other in a main scanning direction and a sub-scanning direction, sequentially irradiating the plurality of stimulable phosphor layer regions so that energy of the stimulating ray projected onto the plurality of stimulable phosphor layer regions per unit area is higher than that projected on regions other than the plurality of stimulable phosphor layer regions, thereby exciting stimulable phosphor contained in the plurality of stimulable phosphor layer regions, and photoelectrically detecting stimulated emission released from the stimulable phosphor layer to produce biochemical analysis data. According to this method, it is possible to effectively prevent the stimulating ray from entering a neighboring stimulable phosphor layer region to be next stimulated as the stimulating ray is scanned and thus prevent stimulable phosphor contained in the neighboring stimulable phosphor layer region from being excited to release radiation energy or light energy stored therein, and, therefore, biochemical analysis data having an excellent quantitative characteristic can be produced in a desired manner.