A burner (100) and a cooker. An inner ring gas mixing cavity (50) and an outer ring gas mixing cavity (60) are formed in the burner (100). The burner (100) comprises a bottom cup (10). The bottom cup (10) comprises a main body (11) which is basically in a disk shape, and an inner ring ejection pipe (12) and an outer ring ejection pipe (13) which are formed on the lower side of the main body (11) and respectively communicated with the inner ring gas mixing cavity (50) and the outer ring gas mixing cavity (60). An inner ring ejection pipe inlet (121) is formed on the inner ring ejection pipe (12). An outer ring ejection pipe inlet (131) is formed on the outer ring ejection pipe (13). The inner ring ejection pipe inlet (121) and the outer ring ejection pipe inlet (131) are basically located at the two opposite ends of one diameter (CL1) of the main body (11). In the burner (100) of the cooker, the inner ring ejection pipe inlet (121) and the outer ring ejection pipe inlet (131) are spaced, so that mutual negative pressure interference therebetween can be reduced, ejection performance is improved, and burning is more stable.