Lead acetate trihydrate crystallizes in a tetramolecular, monoclinic unit cell of dimensions a = 15.85(1), b = 7.30(1), c = 9.10(1) Å, β = 109.8(5)° in the space group C2/m. The crystal structure has been solved by the heavy-atom method and refined to an R value of 0.096 for 790 observed reflections. Nine oxygen atoms belonging to the water molecules and acetate groups coordinate the lead atom whose coordination polyhedron is a monocapped square antiprism. The two crystallographically different acetate groups coordinate both bidentally to the same metal atom. A hydrogen bonding scheme based on the distance criteria has been proposed.