To provide an energizing information measuring and displaying device of a circuit breaker improved so that an existing measuring unit and an existing display unit can be used even for a circuit breaker of a model having a large frame size, and the display unit carried on the measuring unit can be simply attached and detached to change the mounting direction.

In this energizing information measuring and displaying device of the circuit breaker, which is used in the following manner; the measuring unit 2 having an energizing information measuring means built in a case with an external terminal and a display unit 3 mounted on the measuring unit 2 to digitally display the measured information of an electric current path are assembled; the measuring unit 2 is directly connected to a circuit breaker 10 installed in a board; and the display unit 3 is mounted so as to face the front; a detachable bottom raising pedestal 5 to adjust the mounting height of the display unit 3 correspondingly to the frame size of the circuit breaker 10 is assembled to the measuring unit 2, and the carried display unit 3 is locked and fixed onto the bottom raising pedestal 5 by snap-fit coupling.