A novel leaf lettuce cultivar, designated NIZ 44-4707, is disclosed. The invention relates to the seeds of lettuce cultivar NIZ 44-4707, to the plants of lettuce line NIZ 44-4707 and to methods for producing a lettuce plant by crossing cultivar NIZ 44-4707 with itself or another lettuce line. The invention further relates to methods for producing a lettuce plant containing in its genetic material one or more transgenes and to the transgenic plants produced by that method and to methods for producing other lettuce lines derived from the cultivar NIZ 44-4707.