An installation structure for an acoustic transducer configured to operate in accordance with an audio signal for thereby vibrating a vibrated body in a first direction, comprising: a magnetic-path forming portion forming a magnetic path; a movable unit having an electromagnetic coupling portion (EM, 511, 512, 513) electromagnetically coupled to the magnetic-path forming portion, the movable unit being configured to vibrate in the first direction when the electromagnetic coupling portion is driven by the magnetic-path forming portion in response to a drive signal based on the audio signal; an attachment portion (55, T) which attaches the magnetic-path forming portion to a fixed portion; a connector connected to the vibrated body, the connector connecting the movable unit to the vibrated body fixedly in the first direction for transmitting vibration of the movable unit to the vibrated body; and a displacement permitting mechanism configured such that, when the connector is displaced with respect to the fixed portion within a predetermined range in an intersecting direction that intersects the first direction, the displacement permitting mechanism permits electromagnetic coupling between the magnetic-path forming portion and the electromagnetic coupling portion (EM, 511, 512, 513) to be maintained and permits the vibration of the movable unit to be transmitted to the vibrated body, wherein the movable unit includes a rod member having a first end portion connected to the electromagnetic coupling portion and a second end portion connected to the connector, wherein the displacement permitting mechanism is provided at the connector, and wherein the displacement permitting mechanism is configured such that, when the connector is displaced with respect to the magnetic-path forming portion within the predetermined range in the intersecting direction, the displacement permitting mechanism permits the second end portion of the rod member to be connected to the connector in a state in which the rod member is inclined with respect to the first direction, and wherein the displacement permitting mechanism is a joint structure having: a spherical portion provided at the second end portion of the rod member; and at least one contact surface (111a, 112a) formed on the connector and held in contact with the spherical portion when the connector is displaced with respect to the magnetic-path forming portion within the predetermined range in the intersecting direction. a magnetic-path forming portion forming a magnetic path; a movable unit having an electromagnetic coupling portion (EM, 511, 512, 513) electromagnetically coupled to the magnetic-path forming portion, the movable unit being configured to vibrate in the first direction when the electromagnetic coupling portion is driven by the magnetic-path forming portion in response to a drive signal based on the audio signal; an attachment portion (55, T) which attaches the magnetic-path forming portion to a fixed portion; a connector connected to the vibrated body, the connector connecting the movable unit to the vibrated body fixedly in the first direction for transmitting vibration of the movable unit to the vibrated body; and a displacement permitting mechanism configured such that, when the connector is displaced with respect to the fixed portion within a predetermined range in an intersecting direction that intersects the first direction, the displacement permitting mechanism permits electromagnetic coupling between the magnetic-path forming portion and the electromagnetic coupling portion (EM, 511, 512, 513) to be maintained and permits the vibration of the movable unit to be transmitted to the vibrated body, wherein the movable unit includes a rod member having a first end portion connected to the electromagnetic coupling portion and a second end portion connected to the connector, wherein the displacement permitting mechanism is provided at the connector, and wherein the displacement permitting mechanism is configured such that, when the connector is displaced with respect to the magnetic-path forming portion within the predetermined range in the intersecting direction, the displacement permitting mechanism permits the second end portion of the rod member to be connected to the connector in a state in which the rod member is inclined with respect to the first direction, and