A cooling apparatus includes a refrigerating machine including a cooling portion fixed to a support body and cools a cooling target through the cooling portion. The cooling target and the cooling portion are connected by a structure including an extendable pipe filled with a fluidized refrigerant. A first magnetic body fixed to a side of the support body and a second magnetic body fixed to a side of the pipe are arranged around the pipe. The first magnetic body and the second magnetic body are maintained in non-contact with each other.