To provide a portable terminal preventing the loss of portability accompanying screen enlargement, reducing the time and labor of sentence input and easily storing a code for security, and the input method of the portable terminal.

In the portable terminal, characters are inputted by an upper matrix bar 111, a lower matrix bar 112, a left matrix bar 113 and a right matrix bar 114. Among the matrix bars in four directions, the upper matrix bar 111 and the lower matrix bar 112 are provided with the function of specifying a position in a vertical direction on a screen 101 and the left matrix bar 113 and the right matrix bar 114 specify the position in a horizontal direction on the screen 101.