Optical connector and fiber module

An optical connector for connecting the end face of an optical fiber ribbon optically with arrayed optical elements on a substrate, comprising a connector main body having a bottom face parallel to said substrate;

• and a guide groove formed on said connector main body in which said optical fiber ribbon is arranged;
• said guide groove comprising an end face holding slot that holds said optical fiber ribbon so that said end face of said optical fiber ribbon on said bottom face of said connector main body facing said substrate opposes to said arrayed optical elements, a vertical guiding face perpendicular to said substrate and extending from one side of said end face holding slot on said bottom face of said connector main body to the top face thereof, an arcuate guiding face formed in an arc-shape extending from the opposing other side of said end holding slot to the side face of said connector main body, and a positioning face for widthwise positioning and fixing said optical fiber ribbon formed perpendicularly to said substrate adjoining both said vertical guiding face and said arcuate guiding face, wherein said vertical guiding face and said arcuate guiding face and said positioning face define a space that opens toward the top face of said connector main body.