Disclosed is a telescopic pipe. The disclosed telescopic pipe comprises: an external pipe; an internal pipe which is inserted into said external pipe, and is movable; a length adjustment means which is installed on a rear end of said external pipe into which said internal pipe is inserted, and adjusts the length of said internal pipe and said external pipe; and a power supply unit which is installed on one side of said external pipe and said internal pipe, wherein said power supply unit comprises: an outer-side insulating pipe which has a front end that is fixed to a front end of said external pipe, and a rear end that is fixed to said length adjustment unit; an inner-side insulating pipe which has a front end that is inserted to be movable within said outer-side insulating pipe, and a rear end that is fixed to a rear end of the internal pipe such that the inner-side insulating pipe is linked by length adjustment operations of said internal pipe and said external pipe; an electric wire member which is disposed inside of said outer-side insulating pipe and said inner-side insulating pipe, has one end that is fixed to a front end of said outer-side insulating pipe, and a rear end that is fixed to a rear end of said inner-side insulating pipe, wherein at least a portion of the electric wire member has a coil part such that the electric wire member is extended along the length of said outer-side insulating pipe and said inner-side insulating pipe; and an intermediate insulating pipe which is inserted to be movable in said inner-side insulating pipe, and connects said outer-side insulating pipe with said inner-side insulating pipe by the length adjustment operations of said internal pipe and said external pipe.