A camera includes a dust-proofing member which has a transparent portion through which a visible light component is transmitted. The transparent portion is opposed to the front of an image pick-up device at a predetermined interval. A vibration member is arranged at a peripheral portion of the dust-proofing member and vibrates the dust-proofing member. A sealing part seals a space between the image pick-up device and the dust-proofing member. And a spring pressing member presses the dust-proofing member at a periphery thereof toward the sealing part.