A solid-state laser device comprising: a linear resonator in which an output mirror and a rear mirror are disposed on a straight line; a laser rod disposed on an optical path of the resonator; optical members at least including a Q-switch ; and a rod-shaped excitation light source that extends parallel to the laser rod and is configured to emit excitation light to excite the laser rod , wherein the excitation light source is located at a position that is as close to the optical path as possible within a range where a lower end position thereof does not overlap the optical path, wherein the resonator, the laser rod , and the optical members are provided on a common base and are contained in a housing having the base as a portion, wherein a holding part is provided to hold the excitation light source parallel to the laser rod on a side of the laser rod opposite to the base , wherein the optical members including the Q-switch are disposed between the laser rod and the rear mirror , wherein an upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part , with the base as a reference, and wherein the holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source , wherein no optical member is provided between the laser rod and the output mirror , wherein the output mirror is formed such that a reflective coating film of a resonator surface of the output mirror is provided up to the upper end position, thereby allowing longitudinal extraction of the excitation light source to the side of the output mirror . a linear resonator in which an output mirror and a rear mirror are disposed on a straight line; a laser rod disposed on an optical path of the resonator; optical members at least including a Q-switch ; and a rod-shaped excitation light source that extends parallel to the laser rod and is configured to emit excitation light to excite the laser rod , wherein the excitation light source is located at a position that is as close to the optical path as possible within a range where a lower end position thereof does not overlap the optical path, wherein the resonator, the laser rod , and the optical members are provided on a common base and are contained in a housing having the base as a portion, wherein a holding part is provided to hold the excitation light source parallel to the laser rod on a side of the laser rod opposite to the base , wherein the optical members including the Q-switch are disposed between the laser rod and the rear mirror , wherein an upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part , with the base as a reference, and wherein the holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source , wherein no optical member is provided between the laser rod and the output mirror , wherein the output mirror is formed such that a reflective coating film of a resonator surface of the output mirror is provided up to the upper end position, thereby allowing longitudinal extraction of the excitation light source to the side of the output mirror . <EOS>