An ultrasound probe which is capable of structurally improving resolution is provided. This ultrasound probe includes: an ultrasound probe which transmits ultrasound waves to a subject and an optical probe which detects, with use of light, the ultrasound waves reflected off internal tissue of the subject, and openings of the ultrasound probe are larger than openings of the optical probe. With this, reflected waves (ultrasound waves) from the subject can be detected by the large openings, so that high resolution can be obtained relative to a width of the transmitted ultrasound waves.
