A variable aperture device and a
camera module. The variable aperture device comprises at least one
stator (20) and at least one mover (30), wherein the mover (30) is movably assembled on the
stator (20); at least one driving
assembly (40), which is used for driving the mover (30) to axially rotate or move linearly relative to the
stator (20); and a plurality of adjustment assemblies (50), the adjustment assemblies (50) defining at least one light passage hole (500), the adjustment assemblies (50) being adjustably mounted to the stator (20) and the mover (30), and as the mover (30) moves relative to the stator (20), the relative positions of the adjustment assemblies (50) being driven to change, so as to define the size of the light passage hole (500); the stator (20) and the mover (30) are correspondingly provided with at least two sets of ball slots (240, 340), at least two balls (41) are separately assembled within the ball slots (240, 340), the inner wall surface of at least one ball slot (240, 340), extends at an angle relative to an
optical axis L and abuts against at least one ball (41), and the inner wall surface of the remaining at least one ball slot (240, 340) extends in directions perpendicular to the
optical axis and parallel to the
optical axis L.