Optical module

An optical module comprising:

• an optical sub-assembly for converting an electric signal and an optical signal at least from one to the other;
• a flexible wiring board;
• and
• solder electrically connecting the optical sub-assembly with the flexible wiring board, wherein
• the optical sub-assembly includes a plurality of connection electrodes arrayed so as to be arranged in at least a row,
• the flexible wiring board includes a substrate having flexibility and a conductive film provided on one surface of the substrate,
• the conductive film includes a plurality of pad portions to which the plurality of connection electrodes are respectively bonded with the solder and a wiring portion extending in a direction crossing a row in which the plurality of pad portions are arranged,
• the plurality of pad port ions include a terminal portion electrically connected with the wiring portion and at least two land portions located on both sides of the terminal portion while avoiding electrical connection to the wiring portion,
• the solder includes land solder portions respectively overlaid on the at least two land portions and a terminal solder portion overlaid on the terminal portion, and
• the land solder portion has a shape extending longer than the terminal solder portion along a direction in which the wiring portion extends from the connection electrode corresponding thereto.