A vibration device (10, 10A - 10G) comprising: a light transmissive body (11, 11A - 11G) that transmits light of a predetermined wave length; a first cylindrical body that is formed in a cylindrical shape having one end and another end in an axial direction of the first cylindrical body, and supports the light transmissive body (11, 11A - 11G) at the one end; a plate-shaped spring portion that supports the other end of the first cylindrical body ; a second cylindrical body that is formed in a cylindrical shape having one end and another end in an axial direction of the second cylindrical body, and supports, at the one end, a position of the spring portion in an outer side portion of a position at which the first cylindrical body is supported; and a vibrating body that is arranged on the other end side of the second cylindrical body and vibrates in the axial direction of the second cylindrical body , wherein the light transmissive body (11, 11A - 11G) has a main body portion located on an inner side of a portion supported by the first cylindrical body , and a protruding portion extending from the main body portion toward an outer circumference of the light transmissive body (11, 11A - 11G) and protruding outward more than a portion supported by the first cylindrical body , a ratio between an equivalent mass calculated from a moment of inertia of the protruding portion and a weight of the main body portion is equal to or more than 0.8 and equal to or less than 1.2, and the light transmissive body (11, 11A - 11G), the first cylindrical body , the spring portion , and the second cylindrical body are configured such that a resonant frequency of the light transmissive body (11, 11A - 11G) is larger than a resonant frequency of the spring portion . a light transmissive body (11, 11A - 11G) that transmits light of a predetermined wave length; a first cylindrical body that is formed in a cylindrical shape having one end and another end in an axial direction of the first cylindrical body, and supports the light transmissive body (11, 11A - 11G) at the one end; a plate-shaped spring portion that supports the other end of the first cylindrical body ; a second cylindrical body that is formed in a cylindrical shape having one end and another end in an axial direction of the second cylindrical body, and supports, at the one end, a position of the spring portion in an outer side portion of a position at which the first cylindrical body is supported; and a vibrating body that is arranged on the other end side of the second cylindrical body and vibrates in the axial direction of the second cylindrical body , wherein the light transmissive body (11, 11A - 11G) has a main body portion located on an inner side of a portion supported by the first cylindrical body , and a protruding portion extending from the main body portion toward an outer circumference of the light transmissive body (11, 11A - 11G) and protruding outward more than a portion supported by the first cylindrical body , a ratio between an equivalent mass calculated from a moment of inertia of the protruding portion and a weight of the main body portion is equal to or more than 0.8 and equal to or less than 1.2, and the light transmissive body (11, 11A - 11G), the first cylindrical body , the spring portion , and the second cylindrical body are configured such that a resonant frequency of the light transmissive body (11, 11A - 11G) is larger than a resonant frequency of the spring portion . <EOS>