The present disclosure provides a phase shifter and an antenna. The phase shifter includes: a substrate; a signal electrode, and a first reference electrode and a second reference electrode respectively on two sides of an extending direction of the signal electrode; an interlayer insulating layer on the signal electrode, the first reference electrode and the second reference electrode; and at least one phase control unit each including a film bridge. At least part of the at least one phase control unit further includes at least one driving structure including at least a driving electrode; at least part of the at least one driving structure has a different height from a height of the signal electrode in a direction away from the substrate; the driving structure in each phase control unit is at least partially overlapped an orthographic projection of the film bridge on the substrate.