A light emitting device comprising a first unit and a second unit, the first unit comprising: a first excitation light source comprising a laser element for emitting blue wavelength band excitation light; a first wavelength converting member, comprising at least one type of fluorescent material, for absorbing at least a portion of a first excitation light emitted from the first excitation light source, converting the wavelength, and releasing light with a wavelength longer than the first excitation light, wherein the light released by the first wavelength converting member is white light; and a first light guide, which has a refractive index in the center region of the cross-section which is higher than the refractive index of the surrounding region, for transmitting the first excitation light emitted from the first excitation light source to the first wavelength converting member; and the second unit comprising: a second excitation light source comprising a laser element for emitting second excitation light with a wavelength band shorter than the blue wavelength band excitation light emitted by the laser element of the first excitation light source; a second wavelength converting member, which includes at least one type of fluorescent material, for absorbing at least a portion of the second excitation light emitted from the second excitation light source, converting the wavelength, and releasing light with a wavelength longer than the second excitation light; and a second light guide, which has a refractive index in the center region of the cross-section which is higher than the refractive index of the surrounding region, for transmitting the second excitation light emitted from the second excitation light source to the second wavelength converting member; wherein the first and second units are configured such that the light released by the first wavelength converting member is output in combination with the light released from the second wavelength converting member. a first excitation light source comprising a laser element for emitting blue wavelength band excitation light; a first wavelength converting member, comprising at least one type of fluorescent material, for absorbing at least a portion of a first excitation light emitted from the first excitation light source, converting the wavelength, and releasing light with a wavelength longer than the first excitation light, wherein the light released by the first wavelength converting member is white light; and a first light guide, which has a refractive index in the center region of the cross-section which is higher than the refractive index of the surrounding region, for transmitting the first excitation light emitted from the first excitation light source to the first wavelength converting member; and the second unit comprising: a second excitation light source comprising a laser element for emitting second excitation light with a wavelength band shorter than the blue wavelength band excitation light emitted by the laser element of the first excitation light source; a second wavelength converting member, which includes at least one type of fluorescent material, for absorbing at least a portion of the second excitation light emitted from the second excitation light source, converting the wavelength, and releasing light with a wavelength longer than the second excitation light; and a second light guide, which has a refractive index in the center region of the cross-section which is higher than the refractive index of the surrounding region, for transmitting the second excitation light emitted from the second excitation light source to the second wavelength converting member; wherein the first and second units are configured such that the light released by the first wavelength converting member is output in combination with the light released from the second wavelength converting member. a second excitation light source comprising a laser element for emitting second excitation light with a wavelength band shorter than the blue wavelength band excitation light emitted by the laser element of the first excitation light source; a second wavelength converting member, which includes at least one type of fluorescent material, for absorbing at least a portion of the second excitation light emitted from the second excitation light source, converting the wavelength, and releasing light with a wavelength longer than the second excitation light; and a second light guide, which has a refractive index in the center region of the cross-section which is higher than the refractive index of the surrounding region, for transmitting the second excitation light emitted from the second excitation light source to the second wavelength converting member;