Heat sink

A heat sink comprising:

• a base plate thermally connected to a heat-generating element;
• and
• a plurality of plate-like radiating fins erected on a main front surface of the base plate at a predetermined erection angle θ1 with respect to an extending direction of the main front surface of the base plate and thermally connected to the base plate, wherein each of the plurality of plate-like radiating fins has:
• a fin base portion that is a planar surface portion that extends from one end to another end in a width direction of the radiating fin along the main front surface of the base plate and is positioned on the base plate side;
• a perpendicular portion that is a planar surface portion that extends from one end of the fin base portion to a fin tip portion of the radiating fin in a height direction on a same plane as the fin base portion;
• an inclined portion that is a planar surface portion that extends from the perpendicular portion to the other end of the radiating fin at a predetermined inclination angle θ2 with respect to the fin base portion and the perpendicular portion and extends from the fin tip portion to a fin intermediate portion between the fin tip portion and the fin base portion;
• and
• a twisted portion that is a planar surface portion that connects the fin base portion, the perpendicular portion, and the inclined portion to each other.