PURPOSE: To eliminate the generation of flame failure, combustion strength noise, white smoke and black smoke during ignition with regards to a stove which emits exhaust air indoors, using a pot type burner.

CONSTITUTION: A few pores of the lowest stage pore row 3a of elementary rows of pores pored on the lower part of a side wall of a pot 1 is buried continuously so as to provide a non-pore section 5. As a result, the flames which are subjected to vaporizing combustion in the pot 1 because of the shortage of the elementary air, spread on one-side above the non-pore section 5, which forces the flames to reach immediately secondary pore rows 4 having a high numerical aperture and shift to normal combustion. When the flames enter stabilized combustion, the lower part of a blue flame cap 2 is turned into a pre-mixing region, which eliminates one-sided spread of flames and attain complete combustion around the secondary pore rows 4.