A ledger document processing device comprising a display section which displays a live view image captured by an imaging section while waiting for a ledger document to be captured; a processor which actualizes functions comprising: displaying on the display section a guide frame, by superimposing the guide frame on the live view image; characterized in that the guide frame is for a size adjustment task for adjusting such that a pixel-count size of an area (Ga) corresponding to the ledger document in an image to be captured and stored in response to an imaging instruction becomes equal to or larger than a reference number of pixels; and the processor actualizes further functions comprising displaying on the display section another guide frame for indicating a recommended size of the area (Ga), the other guide frame surrounding the guide frame; judging whether a pixel-count size of the area (Ga) corresponding to the ledger document in an image to be captured and stored in response to the imaging instruction is equal to or larger than the reference pixel-count size while waiting for the ledger document to be captured; and notifying of a judgment result of the judging, by varying a display color of the guide frame, wherein image capturing can be performed only when a size of the area (Ga) is equal to or larger than the guide frame and equal to or smaller than the other guide frame. a display section which displays a live view image captured by an imaging section while waiting for a ledger document to be captured; a processor which actualizes functions comprising: displaying on the display section a guide frame, by superimposing the guide frame on the live view image; characterized in that the guide frame is for a size adjustment task for adjusting such that a pixel-count size of an area (Ga) corresponding to the ledger document in an image to be captured and stored in response to an imaging instruction becomes equal to or larger than a reference number of pixels; and the processor actualizes further functions comprising displaying on the display section another guide frame for indicating a recommended size of the area (Ga), the other guide frame surrounding the guide frame; judging whether a pixel-count size of the area (Ga) corresponding to the ledger document in an image to be captured and stored in response to the imaging instruction is equal to or larger than the reference pixel-count size while waiting for the ledger document to be captured; and notifying of a judgment result of the judging, by varying a display color of the guide frame, wherein image capturing can be performed only when a size of the area (Ga) is equal to or larger than the guide frame and equal to or smaller than the other guide frame. displaying on the display section a guide frame, by superimposing the guide frame on the live view image; characterized in that the guide frame is for a size adjustment task for adjusting such that a pixel-count size of an area (Ga) corresponding to the ledger document in an image to be captured and stored in response to an imaging instruction becomes equal to or larger than a reference number of pixels; and the processor actualizes further functions comprising displaying on the display section another guide frame for indicating a recommended size of the area (Ga), the other guide frame surrounding the guide frame; judging whether a pixel-count size of the area (Ga) corresponding to the ledger document in an image to be captured and stored in response to the imaging instruction is equal to or larger than the reference pixel-count size while waiting for the ledger document to be captured; and notifying of a judgment result of the judging, by varying a display color of the guide frame, wherein image capturing can be performed only when a size of the area (Ga) is equal to or larger than the guide frame and equal to or smaller than the other guide frame.