In order to measure a current generated on the basis of a charged particle beam intensity with high sensitivity, a charged particle beam current measurement apparatus according to one embodiment of the present invention is provided with: a magnetic core 102; an induction ring 110 that has a superconductor on a surface or a surface layer; and a SQUID sensor 130. The magnetic core and the induction ring are arranged substantially coaxially to each other, and the superconductor of the induction ring conducts a superconductive current through a poloidal-direction path. The SQUID sensor 130 is magnetically coupled to a magnetic flux passing the inside of the magnetic core in a toroidal direction. The beam current measurement apparatus according to the preferred embodiment is further provided with: a shield ring 160 in which a superconductor is formed.
