A burner for a cooking appliance, the burner comprising: a burner body to receive a gas and air; a burner head seated on the burner body, the burner head comprising an inner burner head and an outer burner head; and a burner cap seated on the burner body to cover the burner head, wherein the outer burner head is provided with an outer flame hole through which a mixture gas is discharged, wherein: the inner burner head is provided with an inner flame hole through which the mixture gas is discharged, wherein the outer burner head is provided with a flame spread space to spread flame into the inner burner head, and a flame spread hole to discharge the mixture gas into the flame spread space, characterized in that the inner burner head further comprises an ignition hole through which the mixture gas in the inner burner head is discharged to ignite the mixture gas by the flame that is spread by the flame spread space, and in that the ignition hole is disposed under the inner flame hole and disposed to face the flame spread space, wherein the highest portion of the ignition hole is lower than that of the flame spread space, and wherein a rib to guide the mixture gas discharged from the ignition hole to flow downward is disposed on the inner burner head. a burner body to receive a gas and air; a burner head seated on the burner body, the burner head comprising an inner burner head and an outer burner head; and a burner cap seated on the burner body to cover the burner head, wherein the outer burner head is provided with an outer flame hole through which a mixture gas is discharged, wherein: the inner burner head is provided with an inner flame hole through which the mixture gas is discharged, wherein the outer burner head is provided with a flame spread space to spread flame into the inner burner head, and a flame spread hole to discharge the mixture gas into the flame spread space, characterized in that the inner burner head further comprises an ignition hole through which the mixture gas in the inner burner head is discharged to ignite the mixture gas by the flame that is spread by the flame spread space, and in that the ignition hole is disposed under the inner flame hole and disposed to face the flame spread space, wherein the highest portion of the ignition hole is lower than that of the flame spread space, and wherein a rib to guide the mixture gas discharged from the ignition hole to flow downward is disposed on the inner burner head. the inner burner head is provided with an inner flame hole through which the mixture gas is discharged, wherein the outer burner head is provided with a flame spread space to spread flame into the inner burner head, and a flame spread hole to discharge the mixture gas into the flame spread space, characterized in that the inner burner head further comprises an ignition hole through which the mixture gas in the inner burner head is discharged to ignite the mixture gas by the flame that is spread by the flame spread space, and in that the ignition hole is disposed under the inner flame hole and disposed to face the flame spread space, wherein the highest portion of the ignition hole is lower than that of the flame spread space, and wherein a rib to guide the mixture gas discharged from the ignition hole to flow downward is disposed on the inner burner head.