A bread maker, having: a main body defining an oven compartment; a pair of kneading drums rotatably provided inside the oven compartment, spaced apart from each other, each kneading drum holding opposite ends of a mixing bag and being rotated; a pair of kneading members oppositely provided between the pair of kneading drums, spaced apart and defining a slit therebetween to allow the mixing bag to pass therethrough; and a slit adjusting part adjusting the pair kneading members to adjust the slit.