The present invention provides an ultrasound probe in which bend of a tip part is fixed only in a state that it is not bent in a direction orthogonal to a direction in which ultrasonic waves are emitted from an ultrasound generation source. To be specific, the ultrasound probe includes: a rod-like tip part inserted into a body cavity an ultrasound emitting part placed at the tip part to emit ultrasonic waves to a subject a first bending part for bending the tip part in a direction substantially orthogonal to the emission direction and a fixing part configured to, when the first bending part is not bending the tip part toward any side of the direction orthogonal to the emission direction, lock a rotation member of the first bending part and inhibit the first bending part from bending the tip part in the direction substantially orthogonal to the emission direction.
