A resin material for acoustic lenses, which contains a resin (a) that contains at least one moiety selected from among an epoxy group, a carbon-carbon double bond, a methylol group and a phenolic hydroxyl group and a resin (b) that contains a structural unit having a polysiloxane bond; an acoustic lens which uses this resin material; an acoustic wave probe; an acoustic wave measurement device; an ultrasound diagnostic system; a photoacoustic wave measurement device; and an ultrasound endoscope.
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