Connector that enables connection between circuit boards with excellent space efficiency

A first mating connector comprising:

• a plurality of mating contacts each having a mating contact portion which is adapted to be connected to a first contact portion of a particular connector as a connection counterpart;
• and
• a mating housing which holds the mating contacts,
• wherein, in the plurality of mating contacts, at least one pair of the adjacent mating contacts is such that the mating contacts forming the pair respectively have short-circuit portions which are formed so as to face each other,
• wherein the short-circuit portions are in contact with each other to connect between the adjacent mating contacts, and
• wherein, when the first mating connector is connected to the particular connector as the connection counterpart, the short-circuit portions are elastically deformed due to a short-circuit release portion of the particular connector to release connection between the adjacent mating contacts.

A connector-attached board comprising:

• a circuit board;
• a first connector;
• and
• a second connector,
• wherein the first connector comprises:
• a first contact;
• and
• a first housing holding the first contact,
• wherein the first housing comprises:
• a first and a second insertion opening which are oriented in mutually different directions;
• and
• a short-circuit release portion which corresponds to the first insertion opening,
• wherein the first contact comprises a first contact portion and a second contact portion which correspond to the first insertion opening and the second insertion opening, respectively,
• wherein the second connector comprises:
• a plurality of second contacts;
• and
• a second housing holding the second contacts,
• wherein adjacent two of the second contacts respectively have short-circuit portions being in contact with each other,
• wherein the first insertion opening has a structure suitable for inserting the second connector,
• wherein the second insertion opening has a structure suitable for inserting a third connector which differs in shape from the second connector,
• wherein the first connector and the second connector are configured such that, when the second connector is inserted into the first insertion opening, the short-circuit release portion is inserted between the short-circuit portions to release a short circuit between the adjacent two second contacts, and
• wherein the first connector and the second connector are mounted at mutually different ends of the circuit board.