Patent ID: 7985177

Claim:
An endoscope for magnified image observation configured to observe a magnified image of in vivo tissue, comprising: an insertion part configured to be inserted into a body; a magnified image observation port comprising a confocal optical system, the magnified image observation port being configured to take in the magnified image of the in vivo tissue in a state where the magnified image observation port is in contact with the in vivo tissue, the observation port being provided at a distal end of the insertion part; and a marking unit configured to mark the in vivo tissue in the state where the magnified image observation port is in contact with the in vivo tissue, the marking unit being configured to mark the in vivo tissue by applying marking liquid to a surface of the in vivo tissue, the marking unit comprising a marking liquid pooling tube that surrounds the magnified image observation port, the marking unit having a marking liquid applying member provided along an outer edge of the magnified image observation port to apply the marking liquid to the in vivo tissue, the marking liquid applying member being formed as a contiguous ring along the outer edge of the magnified image observation port, a marking liquid filled portion provided within the marking liquid pooling tube and configured to be filled with the marking liquid to be supplied to the marking liquid applying member, and the marking liquid filled portion being provided adjacent to the marking liquid applying member, the marking liquid filled portion having a cylindrical shape and a distal opening that extends continuously all around a front end surface of the marking liquid pooling tube, and a back portion of the marking liquid applying member being inserted within the distal opening such that the distal opening is plugged.