[Problem] To provide an optical medical device which enables an optical element to reliably return to an initial position in the case of pushing forward, and a control method for an optical medical device.[Solution] An optical medical device (1), wherein an imaging core (21) for acquiring an optical coherence tomographic image of the inside of a living organism lumen (L) by irradiating the inside of the living organism lumen (L) with light guided by an optical fiber (41) is movably disposed within a bendable sheath (10), the optical medical device comprising a control unit (71) which continuously acquires the optical coherence tomographic image of the inside of the living organism lumen (L) by the imaging core (21) while controlling a drive unit (60) to move the imaging core (21) backward from an initial position located on the leading end side of the sheath (10) to a back end position located on the base end side of the sheath (10). When the imaging core (21) is returned by being moved forward from the back end position to the initial position by the drive unit (60), the control unit (71) acquires the optical brightness distribution of the optical coherence tomographic image of the sheath (10) by the imaging core (21), and controls the actuation of the drive unit (60) when detecting a change in the acquired optical brightness distribution due to the deformation in the axial direction of the optical fiber (41).La présente invention a pour but de proposer un dispositif médical optique qui permet à un élément optique de retourner de façon fiable à une position initiale dans le cas dune poussée vers lavant, et un procédé de commande pour un dispositif médical optique. A cet effet, linvention concerne un dispositif médical optique (1), dans lequel un noyau dimagerie (21) conçu pour acquérir une image tomographique par cohérence optique de lintérieur dune lumière dorganisme vivant (L) en irradiant lintérieur de la lumière dorganisme vivant (L) avec une lumière guidée par
