Abstract: Provided is a measurement probe of which hygiene can be easily secured. The measurement probe (1) receives fluorescence emitted by radiation of excitation light to a fingertip (90). The measurement probe (1) includes: a radiating portion that radiates the excitation light; a light-receiving portion that receives the fluorescence; a sleeve (16) disposed at a front end portion of the radiating portion or the light-receiving portion; and a transparent quartz plate (15) disposed at a front end surface (14I) of the radiating portion or the light-receiving portion. The sleeve (16) is provided with an opening in which the quartz plate (15) is detachably mounted.

Abstract: A transfer-membrane retaining jig (2) that retains a transfer membrane (1) in a separation-transfer device (100) includes: a fixing part (20, 21) that fixes at least one end in a movement direction of the transfer membrane (1), in which the fixing part (20, 21) includes an elastic body (20a, 21a) that abuts the transfer membrane (1) from an opposite side to a dispensing part (50a), and a pressing member (20b, 21b) that presses the transfer membrane (1) against the elastic body (20a, 21a).

Abstract: A measuring device that can obtain a stable measurement result is realized. The measuring device includes a measuring portion (14) that is arranged in one of a placing portion (12) where a fingertip portion (A) is placed, and an interposing portion (11) facing the placing portion (12), and interposing, together with the placing portion, the fingertip portion (A), emits excitation light and receives fluorescence, and a fixing force supply portion (13) that supplies, to the fingertip portion (A) through the interposing portion (11), force which is capable of fixing a relative positional relationship between the fingertip portion (A) and the measuring portion (14).

Abstract: A biomolecule analyzer (100) includes an arm part (20-23, 66) retaining a transfer membrane (1) that is arranged at a position opposing a first opening (50a), and a drive unit (62-65) that is provided below an anode buffer tank (30), and drives the arm part in a substantially horizontal direction, in which the arm part passes along outer sides of side walls of the anode buffer tank (30), wraps around upper ends of the side walls and links at inner walls of the side wall.