A lens device is provided and includes: a housing having a first fixed axis fixed in a transverse direction and a second fixed axis fixed in a longitudinal direction; a first slider supported so as to be slidable along the first fixed axis; a second slider supported so as to be slidable along the second fixed axis; a first movement bar fixed to the first slider in the longitudinal direction; a second movement bar fixed to the second slider in the transverse direction; a lens holding frame supported so as to be slidable along the first movement bar and the second movement bar; and a guide bar fixed to the housing in a direction perpendicular to the optical axis. One of the first and second sliders has an engagement section engaged with the guide bar so as to be regulated in the optical axis direction.