In a translation display apparatus, when an instruction to enlarge and display a part of an image of a translated sentence-added document displayed on a display unit is inputted from a display instruction input section, a partially-enlarged image creating section creates a partially-enlarged image in which a part of the image of a translated sentence-added document is enlarged. Under the control of a control section, an image creating section creates a partial enlargement-added image which is an image obtained by superimposing the partially-enlarged image created by the partially-enlarged image creating section on the image of the translated sentence-added document. Under the control of the control section, the display unit displays the partial enlargement-added image.