SnO2 nanosheet–assembled graded continuous films were successfully fabricated in aqueous solutions containing SnF2 of 250 mM at 90°C. Thickness reached 1200 nm after immersion for 24 h. The nanosheets were 100–500 nm in in‐plane sheet size and 5–20 nm in thickness. The graded structures were caused by gradual change in supersaturation degree of the solutions. The films had a‐axis orientation, antireflective effect, band gap of 3.63 eV, and superhydrophilic surfaces. In contrast, the films immersed for 20 m showed band gap of 4.04 eV and contact angle of 58°.