A tape printing device for printing on a ribbon tape includes: a wrapping length acquisition unit which acquires a ribbon wrapping length that is a necessary length of a ribbon tape for ribbon wrapping, of a necessary tape length that is a necessary length of the ribbon tape for ribbon wrapping and ribbon tying on an object to be wrapped; a tying length storage unit in which a ribbon tying length that is a necessary length of the ribbon tape for ribbon tying, of the necessary tape length, is stored; and a necessary tape length calculation unit which calculates the necessary tape length, based on the ribbon wrapping length that is acquired and the ribbon tying length that is stored.