Provided is a cooling device unit that is capable of ample cooling ability and is also small in scale. The invention is provided with: a heat dissipator (2) a cell holder (3) for holding a cell (7), the cell holder (3) being provided within the heat dissipator (2) and a heat dissipation-side Peltier surface (4) and heat absorption-side Peltier surface (5) and is configured so that the cell (7) within the cell holder acts to cool by causing heat to be dissipated by the heat dissipator (2) via the heat dissipation-side Peltier surface (4). The heat dissipator (2) is constituted of a plurality of heatsinks (28) arranged side by side at intervals, and the cell holder (3) is configured by forming a space for holding the cell (7) in the heatsinks (28). Also provided is a heat conduction member (30) that is provided so as to pass over the plurality of heatsinks (28) and is in contact with the heatsinks (28) the heat conduction member (30) is connected at the heat dissipation-side Peltier surface (4) side, and the configuration is such that the plurality of heatsinks (28) dissipate heat coming from the heat dissipation-side Peltier surface (4) via the heat conduction member (30).Linvention concerne une unité de dispositif de refroidissement qui est apte à une importante capacité de refroidissement et qui est également de petite taille. Linvention comporte : un dissipateur de chaleur (2) un support de cellule (3) pour supporter une cellule (7), le support de cellule (3) étant disposé à lintérieur du dissipateur de chaleur (2) et une surface Peltier côté dissipation de chaleur (4) et une surface Peltier côté absorption de chaleur (5) et est configurée de telle sorte que la cellule (7) à lintérieur du support de cellule agit pour refroidir en générant de la chaleur à dissiper par le dissipateur de chaleur (2) par lintermédiaire de la surface Peltier côté dissipation de chaleur (4). Le dissipateur de chaleur (2) est constitué dune pluralité de dissipateurs thermiques (28) di
