A printer is provided which includes a pattern input module, a printing module executing printing on a printing medium, and a control unit controlling the input and printing modules, wherein when an input pattern inputted from the input module is inputted into strings of a first string and a second string following the first string with a blank space portion formed at least either at the rear of a first pattern area where a first pattern of the first string is formed or at the front of a second pattern area where a second pattern of the second string is formed, the control unit deletes the blank space portion and arranges the first and second patterns into a single-string pattern array where the first and second patterns are arranged sequentially in that order and causes the printing module to print the pattern array on the printing medium.