A computer apparatus including a host unit and a display unit is provided. The host unit has a host bonding area and a host connector, and the host connector is located in the host bonding area. The display unit has a display bonding area and a display connector, and the display connector is located in the display bonding area. The display bonding area is adapted to position to the host bonding area, and the display connector is adapted to couple to the host connector. The display unit is detachably connected to the host unit.