A character information processor for carrying out the processing for printing an input character string, includes: a contact-command receiving section for receiving a contact command which commands to print at a character pitch of 0 between the adjacent two characters; and a printing control section for causing to print two characters, which are defined by the contact command, at a character pitch of 0. In addition, a character information processor for printing an input character string on a printed medium so as to exhibit a printing effect on the basis of the stored attribute data of printing effect, includes: a changed-contents available-extent receiving section for allowing a user to select an available extent of the attribute data of printing effect from a plurality of phased extents with respect to the input character string, each of the phased extents having a greater size than an available minimum size; and an attribute-data changing section for allowing to change the attribute data of printing effect in accordance with the changed contents received by the attribute-data changed-contents receiving section.