An image stabilizing device for a binocular telescope having a pair of telescopic optical systems (7, 21L, 21R) which are installed in parallel in a binocular housing and each of which is made up of an objective lens (2, 22L, 22R), an erecting prism (1, 24L, 24R) and an eyepiece lens (3, 25L, 25R) coaxially arranged in this order, each said erecting prism (1, 24L, 24R) being capable of rotating on horizontal first and vertical second axes of rotation intersecting an optical axis (6, 22L, 22R) of each said telescopic optical system including said erecting prism (1, 24L, 24R) as a constituent optical element so as to compensate for deterioration of a telescopic optical image caused due to external vibrations, said image stabilizing device comprising: a gimbal structure for mounting thereon both of said erecting prisms, said gimbal structure comprising: a gimbal casing fixedly mounted in said binocular housing; an external gimbal frame rotatably mounted on said gimbal casing so as to rotate on said horizontal first axis of rotation; and a pair of internal gimbal frames (29L, 29R) each of which fixedly holds said erecting prism (1, 24L, 24R) thereon and are rotatably mounted on said external gimbal frame so as to rotate on said vertical second axis of rotation; an angular velocity detector for detecting an angular displacement of at least one of said internal gimbal frames (29L, 29R); and characterized in an external gimbal frame drive voice coil motor disposed between said gimbal casing and said external gimbal frame for rotating said external gimbal frame on said horizontal first axis of rotation; and an internal gimbal frame drive voice coil motor (42L, 42R) disposed between said external gimbal frame and each of said internal gimbal frames (29L, 29R) for rotating each of said internal gimbal frames (29L, 29R) on said vertical second axis of rotation; wherein each of said external gimbal frame drive voice coil motor and said internal gimbal frame drive voice coil motors (42L, 42R) comprises first yoke members (46, 46L, 46R) having a permanent magnet (45, 45L, 45R) mounted thereon and second yoke members (47, 47L, 47R) having a looped coil (43, 43L, 43R) with an empty space therein and a position detection device (44, 44L, 44R) disposed in said empty space of said looped coil (43, 43L, 43R) for providing a position signal indicating a position of said looped coil (43, 43L, 43R) relative to said permanent magnet (45, 45L, 45R). a gimbal structure for mounting thereon both of said erecting prisms, said gimbal structure comprising: a gimbal casing fixedly mounted in said binocular housing; an external gimbal frame rotatably mounted on said gimbal casing so as to rotate on said horizontal first axis of rotation; and a pair of internal gimbal frames (29L, 29R) each of which fixedly holds said erecting prism (1, 24L, 24R) thereon and are rotatably mounted on said external gimbal frame so as to rotate on said vertical second axis of rotation; an angular velocity detector for detecting an angular displacement of at least one of said internal gimbal frames (29L, 29R); and characterized in an external gimbal frame drive voice coil motor disposed between said gimbal casing and said external gimbal frame for rotating said external gimbal frame on said horizontal first axis of rotation; and an internal gimbal frame drive voice coil motor (42L, 42R) disposed between said external gimbal frame and each of said internal gimbal frames (29L, 29R) for rotating each of said internal gimbal frames (29L, 29R) on said vertical second axis of rotation; a gimbal casing fixedly mounted in said binocular housing; an external gimbal frame rotatably mounted on said gimbal casing so as to rotate on said horizontal first axis of rotation; and a pair of internal gimbal frames (29L, 29R) each of which fixedly holds said erecting prism (1, 24L, 24R) thereon and are rotatably mounted on said external gimbal frame so as to rotate on said vertical second axis of rotation; an angular velocity detector for detecting an angular displacement of at least one of said internal gimbal frames (29L, 29R); and characterized in an external gimbal frame drive voice coil motor disposed between said gimbal casing and said external gimbal frame for rotating said external gimbal frame on said horizontal first axis of rotation; and an internal gimbal frame drive voice coil motor (42L, 42R) disposed between said external gimbal frame and each of said internal gimbal frames (29L, 29R) for rotating each of said internal gimbal frames (29L, 29R) on said vertical second axis of rotation; wherein each of said external gimbal frame drive voice coil motor and said internal gimbal frame drive voice coil motors (42L, 42R) comprises first yoke members (46, 46L, 46R) having a permanent magnet (45, 45L, 45R) mounted thereon and second yoke members (47, 47L, 47R) having a looped coil (43, 43L, 43R) with an empty space therein and a position detection device (44, 44L, 44R) disposed in said empty space of said looped coil (43, 43L, 43R) for providing a position signal indicating a position of said looped coil (43, 43L, 43R) relative to said permanent magnet (45, 45L, 45R).