Abstract: Proposed is a connector apparatus with a switch for improving contact reliability, the connector apparatus being capable of enabling an operator to electrically test proper coupling of a connector position assurance member. When the connector position assurance member is completely coupled to a first housing, a pair of switches are stably brought into contact with each other in a state of being inserted into a switch guide recess formed in a second leg portion. Therefore, the pair of switches can be safely protected from foreign substances, etc., thereby improving the contact reliability of the first and second switches.