A composition for an acoustic wave probe, comprising a polysiloxane having a vinyl group and a phenyl group, a polysiloxane having two or more Si-H groups in a molecular chain, titanium oxide particles, and silica particles, A composition for an acoustic wave probe, wherein at least one of the titanium oxide particles (C) and the silica particles (D) is a surface-treated particle, a silicone resin for an acoustic wave probe, an acoustic wave probe, an acoustic wave measurement device, and an ultrasonic diagnostic device , Ultrasonic probe, photoacoustic wave measuring apparatus and ultrasonic endoscope.
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