Electrical connecting device, inspection apparatus, and method for electrical connection between contact target and contact member

A method for electrically connecting a contact member and a contact target covered with an insulating layer in an electrical connecting device including the contact member, a main body having a recess on a surface thereof opposed to the contact target, and a flexible portion that covers the recess to form a sealed space, wherein the contact member is disposed to be opposed to the recess with the flexible portion interposed therebetween, the method comprising:

• adjusting a pressure in the sealed space and destroying the insulating layer that covers the contact target by making the contact member repeatedly collide with the insulating layer;
• and
• adjusting a pressure in the sealed space and electrically connecting the contact target and the contact member by bringing the contact member into contact with the contact target in a state where the insulating layer is destroyed.