The present disclosure provides a spinal endoscope comprising an imaging device and an elongate rigid tube coupled to the imaging device, wherein the tube receives therein: a lens coupled to the imaging device to allow observation of a tissue; at least one irrigation channel to allow injection of a cleaning liquid to secure a view for surgery; a working channel to allow passage of a surgery-tool therethrough to a target location, and an optical fiber to allow irradiation of light beams, the spinal endoscope being characterized in that the working channel includes a first portion with a circular arc cross-sectional shape face-contacting and partially corresponding to an inner circumference of the elongate rigid tube, and a second portion with a linear cross-sectional shape, wherein the second portion connects both ends of the first portion.