A connector includes a plurality of contacts, a holding member and a shell. The holding member has a main portion and a tongue portion. The main portion includes three or more positioned portions. The shell is formed with a hole and three or more positioning protrusions. The hole has a closed periphery on a surface of the shell. The hole pierces the shell in a first direction perpendicular to a mating direction. The positioning protrusions occupy zones, respectively, in the mating direction. The zones overlap with each other in the mating direction. The positioning protrusions include a first positioning protrusion and two second positioning protrusions. The first positioning protrusion forms a part of the closed periphery of the hole. The first positioning protrusion faces the hole. When the shell is viewed alone, at least one of the second positioning protrusions is visible through the hole.