A phototherapy unit (10), a bendable vibration-type phototherapy device (100) having an articulated film and formed by assembling together phototherapy units (10), and a phototherapy instrument provided with said phototherapy device (100). A bendable integral body is formed by connecting two or more than two phototherapy units (10) by means of an articulated film coupler (20). A silicon rubber protective ring (30) is disposed on the circumference of the phototherapy units (10). A fixation band fastener (40) is disposed at each of two ends of the articulated film coupler (20), and each fixation band fastener (40) is provided with a slot (60) facilitating the connection of fixation bands (70). A silica gel light-blocking strip (50) used for clamping and preventing light leakage is disposed at a flexible seam between every two phototherapy units (10). The phototherapy instrument comprises the phototherapy device (100), a phototherapy instrument main unit (200), and a power adapter (500). The two or more than two phototherapy units (10) are interconnected by means of the articulated film coupler (20), so as to form the bendable vibration-type therapy device capable of being adapted to the shape of parts of a human body, and the therapy device can be adapted to the shape of the parts of the human body, so that the phototherapy units (10) are directly aligned with treatment points, thereby optimizing the therapy effect.Linvention concerne une unité de photothérapie (10), un dispositif de photothérapie du type à vibrations (100), pliable, comprenant un film articulé et formé par assemblage dunités de photothérapie (10) les unes avec les autres, et un instrument de photothérapie pourvu de ce dispositif de photothérapie (100). Un corps dun seul tenant est formé par raccordement dau moins deux unités de photothérapie (10) au moyen dun dispositif daccouplement de film articulé (20). Un anneau de protection en caoutchouc de silicium (30) est disposé sur la circonférence des uni
