Provided are an optical fiber scanner, an illuminating device, and an observation device that accurately position a wiring with respect to a piezoelectric element and improve assemblability. An optical fiber scanner (11) according to the present invention has an optical fiber (10) for guiding light and a through hole (17) for penetrating the optical fiber (10), and is provided at the tip of the optical fiber (10). A vibration transmission member (14) for transmitting vibration, at least one piezoelectric element (12) disposed on the outer peripheral surface of the vibration transmission member (14) for vibrating the tip of the optical fiber (10), and a vibration transmission member ( 14), a fixing portion (13) for fixing the optical fiber (10) and a wiring (22) for applying a voltage to the piezoelectric element (12) are integrally formed so as to extend in the longitudinal axis direction. And a cylindrical wiring holding member (16) covering at least a part of the base end side of the piezoelectric element (12). The wiring holding member (16) has a contact portion (18) for fixing the wiring (22) to the outer peripheral surface of the piezoelectric element (12).圧電素子に対し精度よく配線を位置決めし、組立性を向上させる光ファイバスキャナ、照明装置および観察装置を提供する。本発明に係る光ファイバスキャナ（１１）は、光を導光する光ファイバ（１０）と、光ファイバ（１０）を貫通させる貫通孔（１７）を有し、光ファイバ（１０）の先端部に振動を伝達する振動伝達部材（１４）と、振動伝達部材（１４）の外周面に配置され、光ファイバ（１０）の先端部を振動させる少なくとも１つの圧電素子（１２）と、振動伝達部材（１４）の基端側に設けられ、光ファイバ（１０）を固定する固定部（１３）と、圧電素子（１２）に電圧を印加する配線（２２）が長手軸方向に延びる状態に一体形成され、圧電素子（１２）の少なくとも基端側の一部を被覆する筒状の配線保持部材（１６）とを備える。配線保持部材（１６）は、配線（２２）を圧電素子（１２）の外周面に接触固定させる接触部（１８）を有する。
