A plural-communication-line-containing apparatus capable of containing plural communication lines comprises: a communication-line-type discriminator for discriminating a type of communication line; a communication-line-number counter for counting the number of communication lines for each type of communication line; a communication-line-name determiner for determining a communication line name on the basis of the discriminated type of communication line and the counted number of communication lines; and a communication-line-name display for displaying the determined communication line name. Thus, in the plural-communication-line-containing apparatus capable of being connected with the plural communication lines, the names of the communication lines can be appropriately displayed and an operator can easily discriminate the communication lines.