A measurement device comprising: a current applying unit which applies a pulse current or a current of a plurality of frequencies to a laminated body having a structure in which a plurality of layers having different electrical conductivities from each other are laminated; an acquisition unit which acquires in-plane distribution information including at least information indicating distribution of a magnetic field of a first plane outside the laminated body; and a processing unit which generates three-dimensional magnetic field distribution information indicating a three-dimensional distribution of magnetic field on an outside of the laminated body based on the in-plane distribution information and generates information on an inside of the laminated body by processing the three-dimensional magnetic field distribution information on the outside of the laminated body, wherein the in-plane distribution information includes frequency dependent complex data which is information indicating response characteristics to a change in current applied by the current applying unit, the three-dimensional magnetic field distribution information on the outside of the laminated body includes frequency characteristics of a magnetic field, the processing unit specifies a position including depth information of a defect inside the laminated body based on the three-dimensional magnetic field distribution information on the outside of the laminated body, a boundary condition between the magnetic fields inside and outside the laminated body, and an equation relating to the magnetic field inside the laminated body, and the equation is an averaged and continuous diffusion type partial differential equation of the laminated body. a current applying unit which applies a pulse current or a current of a plurality of frequencies to a laminated body having a structure in which a plurality of layers having different electrical conductivities from each other are laminated; an acquisition unit which acquires in-plane distribution information including at least information indicating distribution of a magnetic field of a first plane outside the laminated body; and a processing unit which generates three-dimensional magnetic field distribution information indicating a three-dimensional distribution of magnetic field on an outside of the laminated body based on the in-plane distribution information and generates information on an inside of the laminated body by processing the three-dimensional magnetic field distribution information on the outside of the laminated body, wherein the in-plane distribution information includes frequency dependent complex data which is information indicating response characteristics to a change in current applied by the current applying unit, the three-dimensional magnetic field distribution information on the outside of the laminated body includes frequency characteristics of a magnetic field, the processing unit specifies a position including depth information of a defect inside the laminated body based on the three-dimensional magnetic field distribution information on the outside of the laminated body, a boundary condition between the magnetic fields inside and outside the laminated body, and an equation relating to the magnetic field inside the laminated body, and the equation is an averaged and continuous diffusion type partial differential equation of the laminated body.