An ultrasound probe system includes a bar-like main body portion, an ultrasound observation portion provided in the main body portion and configured to transmit ultrasound in a side surface direction of the main body portion and receive a reflected wave, a distal end portion provided such that a proximal end face, which is a surface on a proximal end side, is adjacent to a distal end in an axial direction of the main body portion, the distal end portion having a diameter larger than the main body portion, a cylindrical sheath portion having a diameter larger than the main body portion and configured to house the main body portion on an inside thereof to be capable of advancing and retracting in the axial direction, a distal end face arranged at a distal end of the sheath portion and facing the proximal end face, a specimen collecting portion provided on at least one of the proximal end face and the distal end face, an entire circumference of the specimen collecting portion being formed at an acute angle toward the axial direction in order to separate a specimen from a subject in an annular shape, and an edge portion arranged on the proximal end face or the distal end face to cross the entire circumference of the specimen collecting portion in order to cut the annular specimen collected by the specimen collecting portion.
