Connector

A connector comprising:

• a first connector including a first housing;
• and
• a second connector including a second housing into which the first housing is inserted,
• wherein the first housing includes a first main body, which is inserted into the second housing, and a first locking portion,
• the second housing includes a peripheral wall, which covers the first main body, and a second locking portion,
• the first connector includes an outer surface that faces the peripheral wall in a state where the first main body is covered by the peripheral wall, a first code that is provided on the outer surface, and a second code that includes different information from the first code and is disposed on the outer surface so as to surround the first code, and
• the peripheral wall includes an exposure hole that is disposed to expose the first code and cover the second code in a state where mating of the first connector and the second connector has been completed by the first locking portion and the second locking portion.