The present invention relates to a block deck used as the interior or exterior material of a building. More specifically, disclosed is a block deck using concrete, wherein a hollow portion is formed inside and filled with concrete so as to exhibit superior strength. The present invention provides a block deck including: a frame member formed with a hollow portion inside; and filler formed of a concrete material so as to be filled in the hollow portion. At this time, the concrete may be foamed according to desired strength with a foaming rate in the range of 0-50%. The frame member may be formed of natural wood, synthetic wood and synthetic resin materials. And, the frame member may be formed integrally or divisionally into two or more so as to be coupled, wherein coupling is carried out by being fitted in a sliding manner.