An acoustic reproduction device for causing a user to hear sound, comprising: a vibration unit including a piezoelectric element that is adapted to flex and a panel to which the piezoelectric element is attached and that is adapted to vibrate by being bent directly by the piezoelectric element; a holder configured to hold the vibration unit at a position where the vibration unit contacts the user's ear, characterized in that the holder comprises a support, an ear hook, and a body, one end of the support is connected to the vibration unit, another end of the support is connected to one end of the ear hook, and another end of the ear hook is connected to the body, the ear hook is shaped as a hook conforming to the user's ear and contacts the outside of the user's auricle, the body is placed behind the user's ear and has a predetermined weight, the acoustic reproduction device further comprises a pressing member and an attaching portion for attaching the pressing member to the vibration unit, the pressing member is adapted to contact a portion of the external ear opposite to the user's tragus, the vibration unit is pressed against the user's tragus from inside the user's ear by a force resulting from the weight of the body and the pressing member, and the vibration unit is adapted to cause the user to hear sound by contacting the user's tragus, from inside the user's ear and transmitting vibration of the panel to the user's tragus. a vibration unit including a piezoelectric element that is adapted to flex and a panel to which the piezoelectric element is attached and that is adapted to vibrate by being bent directly by the piezoelectric element; a holder configured to hold the vibration unit at a position where the vibration unit contacts the user's ear, characterized in that the holder comprises a support, an ear hook, and a body, one end of the support is connected to the vibration unit, another end of the support is connected to one end of the ear hook, and another end of the ear hook is connected to the body, the ear hook is shaped as a hook conforming to the user's ear and contacts the outside of the user's auricle, the body is placed behind the user's ear and has a predetermined weight, the holder comprises a support, an ear hook, and a body, one end of the support is connected to the vibration unit, another end of the support is connected to one end of the ear hook, and another end of the ear hook is connected to the body, the ear hook is shaped as a hook conforming to the user's ear and contacts the outside of the user's auricle, the body is placed behind the user's ear and has a predetermined weight, the acoustic reproduction device further comprises a pressing member and an attaching portion for attaching the pressing member to the vibration unit, the pressing member is adapted to contact a portion of the external ear opposite to the user's tragus, the vibration unit is pressed against the user's tragus from inside the user's ear by a force resulting from the weight of the body and the pressing member, and the vibration unit is adapted to cause the user to hear sound by contacting the user's tragus, from inside the user's ear and transmitting vibration of the panel to the user's tragus. the vibration unit is pressed against the user's tragus from inside the user's ear by a force resulting from the weight of the body and the pressing member, and the vibration unit is adapted to cause the user to hear sound by contacting the user's tragus, from inside the user's ear and transmitting vibration of the panel to the user's tragus.