Printed circuit board

A printed circuit board comprising:

• a base film having a main surface;
• and
• an electrically conductive pattern disposed on the main surface,
• wherein a normal line of the main surface is along a first direction,
• wherein the electrically conductive pattern includes a plurality of wiring portions disposed side by side along a second direction to be spaced apart from each other, the second direction being orthogonal to the first direction,
• wherein the plurality of wiring portions include a first wiring portion and a second wiring portion that are each present at a corresponding one of both ends in the second direction and a plurality of third wiring portions that are present between the first wiring portion and the second wiring portion in the second direction, and
• wherein, in the second direction, a width of the first wiring portion and a width of the second wiring portion are each 1.1 times to 4.0 times an average value of widths of the plurality of third wiring portions.