Patent ID: 8282600

Claim:
A body-insertable device, configured to be introduced into a desired part in a body for injecting a liquid medicine stored in a casing into the desired part, the body-insertable device comprising: a projecting portion which projects an injection needle injecting the liquid medicine toward the desired part, the injection needle having a plurality of angle detection markers each having a predetermined width in a longitudinal direction of the injection needle; an imaging unit which images an image including the injection needle projected from the casing; an angle detecting unit which detects the angle detection markers from the image, and calculates a puncture angle, formed between a biological tissue surface in the desired part and the injection needle, based on a result of the detection; and a control unit which controls a puncture depth of the injection needle from a biological tissue surface in the desired part based on the calculated puncture angle of the injection needle and the plurality of angle detection markers.