A coffee extraction apparatus includes: a first burr grinding supplied whole beans, a first burr through-hole defined in the first burr, a first burr inlet receiving the whole beans, a first burr outlet discharging coffee powder, a second burr inserted into the first burr through-hole to define a grinding space for grinding the whole beans, a first rotary part rotating the first burr, a first gear part including (i) a first main gear rotating at a fixed position and (ii) a first subordinate gear that rotates and that moves in a circumferential direction of the first rotary part according to rotation of the first main gear, an extractor that receives and mixes the coffee powder and the coffee powder and water to extract coffee liquid. Based on the first main gear rotating, the first subordinate gear is configured to connect to the first rotary part.