Provided are an optical fiber scanner, an illumination device, and an observation device such that wires can be precisely positioned on piezoelectric elements, thereby facilitating assembly. The optical fiber scanner (11) according to the present invention includes: an optical fiber (10) that guides light； a vibration transmission member (14) which has a through hole (17) through which the optical fiber (10) passes and which transmits vibrations to the tip of the optical fiber (10)； at least one piezoelectric element (12) that is positioned on an outer peripheral surface of the vibration transmission member (14) and causes the tip of the optical fiber (10) to vibrate； a fixing part (13) that is provided on a base end side of the vibration transmission member (14) and fixes the optical fiber (10)； and a tubular wire holding member (16) which is integrally formed such that a wire (22) for applying a voltage to the piezoelectric element (12) extends in a longitudinal direction and which covers at least a portion of the base end side of the piezoelectric element (12). The wire holding member (16) has a contact section (18) for placing the wire (22) in fixed contact to an outer peripheral surface of the piezoelectric element (12).La présente invention concerne un scanner à fibre optique, un dispositif d'éclairage, et un dispositif d'observation de telle sorte que des fils peuvent être positionnés avec précision sur des éléments piézoélectriques, facilitant ainsi l'assemblage. Le scanner à fibre optique (11) selon la présente invention comprend : une fibre optique (10) qui guide la lumière ； un élément de transmission de vibration (14) qui présente un trou traversant (17) à travers lequel la fibre optique (10) passe et qui transmet les vibrations à la pointe de la fibre optique (10) ； au moins un élément piézoélectrique (12) qui est positionné sur une surface périphérique externe de l'élément de transmission de vibration (14) et qui amène la pointe de la fibre optique (10
