[Problem] To provide a gripping mechanism capable of suppressing the occurrence of static electricity in or contamination of an article being gripped and capable of stabilizing the posture of the article being gripped. [Solution] A gripping mechanism for gripping cuvettes (T), comprising: a gripping section (50) that grips a cuvette (T) from the side; and a pressing section (60) that presses downwards on the upper end surface of the cuvette (T) held in a gripped state by the gripping section (50). The pressing section (60) is arranged such that the center axis along the vertical direction of the cuvette (T) matches the center axis along the vertical direction of the pressing section (60), when the cuvette (T) is held a gripped state by the gripping section (50).
