To obtain a connection holder which can preserve insulation and prevent shifting of a conductor connection.

A conductor through-hole 18, for passing through a conductor to be connected, is provided on one side of an insulating substrate 17 made of electrical insulating material. A lock member 19, whose insulating tube 19a is passed into the hole 23a of a coil plate 1 being a support and which is slip- stopped with a hook 19b is erected on the side of one face on the side of one end of the insulation substrate 17. A clamp part 20, for clamping a cord to be connected with a conductor passing through a conductor through-hole 18, is provided on the other side of the insulation substrate 17 on a side opposite from the side where the lock member 19 is provided.