A silicon carbide based porous article comprising silicon carbide particles (1) as an aggregate and metallic silicon (2), characterized in that the silicon carbide based porous article has an average pore diameter 0.25 times or more the average particle diameter of the silicon carbide particles (1), or in that the carbide particles (1) have an acute contact angle with the metallic silicon (2), or in that it has a porous structure formed by the mutual bonding of a number of secondary structure particles which are formed by the contact of a piece of metallic silicon (1) with four or more of silicon carbide particles (1). The silicon carbide based porous article can be prepared through the sintering at a relatively low firing temperature, and therefore can be prepared at a reduced cost with an improved yield, and thus can be made available to users at a lower price.