Provided is a muscle strength measurement device capable of measuring the muscle strength of small primates such as marmosets easily and efficiently. The muscle strength measurement device (1) is provided with: an operating lever (2) that can be drawn forward a loading tray (3) connected to the operating lever (2) a support plate (4) that supports the loading tray (3) so as to be movable in the front-back direction a spring member (5) that energizes the loading tray (3) in the direction opposite to the drawing operation of the operating lever (2) and a food-receiving dish (6) disposed below the loading tray (3). A hole (41) is formed in the support plate (4) and food (F) is placed on the loading tray (3) through the hole (41). Behind the hole (41), a through hole (34) is formed in the loading tray (3) and with the forward movement of the loading tray (3), the food (F) on the loading tray (3) passes through the hole (41) and the through hole (34) and falls onto the food-receiving dish (6). A transparent cover (7) is erected at the front end of the support plate (4), and the food (F) on the loading tray (3) is visible from the front.Linvention concerne un dispositif de mesure de force musculaire capable de mesurer la force musculaire de petits primates, tels que des marmousets, facilement et de manière efficace. Le dispositif de mesure de force musculaire (1) comporte : un levier dactionnement (2) qui peut être tiré vers lavant un plateau de chargement (3) relié au levier dactionnement (2) une plaque de support (4) qui supporte le plateau de chargement (3) de façon à pouvoir se déplacer dans la direction avant-arrière un élément de ressort (5) qui excite le plateau de chargement (3) dans la direction opposée à lopération de traction du levier dactionnement (2) et un plat de réception daliment (6) disposé au-dessous du plateau de chargement (3). Un trou (41) est formé dans la plaque de support (4) et un aliment (F) est placé sur le plateau de chargement (3) à trave
