A cooling device comprising: a base block including a back-side portion thermally connectable to a heating element; a heat pipe group formed of a plurality of heat pipes, each of which includes a first tubular portion and a second tubular portion, the first tubular portion being fixed to a front-side portion of the base block and being disposed along a planar direction of the base block, the second tubular portion being connected to the first tubular portion and being provided in a standing manner from the base block; and a fin group formed of a plurality of fins fixed to the heat pipe group, the fins being parallel to each other in a standing direction of the heat pipe group, wherein a plurality of the first tubular portions are fixed to one another through the base block, while a plurality of the second tubular portions are fixed to one another through the fin group, the base block includes a recessed part extending in a longitudinal direction and a width direction, and having the first tubular portion accommodated therein, and a pair of wall parts protruding from opposite sides of the recessed part in the width direction along an outer peripheral surface of the first tubular portion, the heat pipe is crimped and fixed to the recessed part and the pair of wall parts, the pair of wall parts has an equal or nearly equal length in a protruding direction, the base block is located along a vertical direction, the first tubular portion of the heat pipe is provided along a horizontal direction, the second tubular portion of the heat pipe is inclined upward toward a tip end relative to a thickness direction of the base block, and the pair of wall parts is formed at an inclination angle equal to, or nearly equal to, the inclination angle of the second tubular portion inclined upward toward the tip end. a base block including a back-side portion thermally connectable to a heating element; a heat pipe group formed of a plurality of heat pipes, each of which includes a first tubular portion and a second tubular portion, the first tubular portion being fixed to a front-side portion of the base block and being disposed along a planar direction of the base block, the second tubular portion being connected to the first tubular portion and being provided in a standing manner from the base block; and a fin group formed of a plurality of fins fixed to the heat pipe group, the fins being parallel to each other in a standing direction of the heat pipe group, wherein a plurality of the first tubular portions are fixed to one another through the base block, while a plurality of the second tubular portions are fixed to one another through the fin group, the base block includes a recessed part extending in a longitudinal direction and a width direction, and having the first tubular portion accommodated therein, and a pair of wall parts protruding from opposite sides of the recessed part in the width direction along an outer peripheral surface of the first tubular portion, the heat pipe is crimped and fixed to the recessed part and the pair of wall parts, the pair of wall parts has an equal or nearly equal length in a protruding direction, the base block is located along a vertical direction, the first tubular portion of the heat pipe is provided along a horizontal direction, the second tubular portion of the heat pipe is inclined upward toward a tip end relative to a thickness direction of the base block, and the pair of wall parts is formed at an inclination angle equal to, or nearly equal to, the inclination angle of the second tubular portion inclined upward toward the tip end.