PURPOSE: To improve reliability in paper-feeding operation by preventing paper- feeding load from increasing and the papers from being jammed, by making the gap, between fanfold papers and the paper-storing section, wider on the folded section rather than on the center section.

CONSTITUTION: A storing section 101 of a printer-equipped portable electronic calculator for storing fanfold papers 4, which is composed of a top case 1, provided with a keyboard 7, an indicating section 8 and an electronic part 6, and a bottom case 2 equipped with a printer 3, is so designed that a top section 101a of a folded section 14 on the opposite side of the printer 3 of fanfold papers 4 is kept away from an electronic part 6 on the top case 1 and made wider than the other section 101b. It is possible, by doing so, to prevent a force (p), which works on a fold 4ab between the topmost paper 4a and the next paper 4b, from working in the direction buckling the papers, and therefore, the fanfold papers 4 becomes able to be fed to the printer 3 positively one by one.