In a coaxial connector with a floating mechanism, a housing includes a housing base fixed to a support, a housing movable portion that is movable with a center contact relative to the housing base, and a floating spring one end of which is fixed to the housing base and the other end of which is fixed to the housing movable portion. The floating spring includes a support fixing portion fixed to the housing base, a floating fixing portion fixed to the housing movable portion, and an elastically deformable swing spring portion that couples the support fixing portion and the floating fixing portion.