Tactile display which displays character and graphic information dynamically from computer by making pins array up and down has been developed. Shape Memory Alloy (SMA) micro-coil actuators contract and make the pins up and down when an electrical current is supplied. Magnetic material tube is attached to each pin and a permanent magnet fixes position of the pins up or down. Electrical consumption is low because the current is supplied only when the pins move. A 2-D tactile display which has 100 (10 × 10) pins array has been developed and successfully operated. The tactile information were displayed sequentially every 0.3 second and the pins were latched at 0.1 N by magnetic force. The pins are arranged at a pitch of 2.5 mm and move 2 mm up and down individually. In order to present the tactile information accurately, narrower pin pitch of the tactile display is preferable. A module for tactile display with a pin pitch of 1.27 mm has been fabricated and successfully operated. A multi-step magnetic latch has been developed for a 3-D tactile display. By using these mechanisms, large displacement and accurate positioning of the pin for 3-D expression can be realized.