A connector apparatus is provided having a first connector including a first contact part with first and second contact terminals connected by a first connection part and a space therebetween, the second contact terminal being bent such that the space between the first and second contact terminals becomes narrower, a second connector engageable to the first connector and including a second contact part with third and fourth contact terminals connected by a second connection part and a space therebetween, the fourth contact terminal being bent such that the space between the third and fourth contact terminals becomes wider. When the first and second connectors are engaged, the first and second contact parts are connected having the third and fourth connection terminals sandwiched between the first and second connection terminals, having the first contact terminal contact the fourth contact terminal, and having the second contact terminal contact the third contact terminal.