Patent ID: 8303492

Claim:
An endoscope apparatus comprising: a transparent member provided at a distal end of an insertion portion of an endoscope to face an image pickup optical system; an ultrasonic transducer attached to an inner surface of the transparent member; and a deflection portion provided at an outer surface of the transparent member which changes a direction of propagation of an ultrasonic wave from the ultrasonic transducer; wherein the deflection portion changes a direction of propagation of at least some of ultrasonic waves generated from the ultrasonic transducer to a direction inside or at a surface of the transparent member toward a center of a part facing the image pickup optical system and the deflection portion comprises a reflecting surface which is formed at the outer surface of the transparent member and is composed of an inclined surface inclined at a predetermined angle with respect to the surface where the ultrasonic transducer is attached or a curved surface.