Pseudoboa haasi, also known commonly as the Paraná false boa, is a species of snake in the subfamily Dipsadinae of the family Colubridae.

The specific name, haasi, is in honor Albrecht Haas who collected the holotype.

[3] P. haasi is found in southern Brazil, in the states of Paraná, Rio Grande do Sul, and Santa Catarina; and in extreme northeastern Argentina, in the province of Misiones.

[1][2] The preferred natural habitat of P. haasi is forest, but it also can survive in disturbed areas.

[1] P. haasi preys upon lizards, snakes, and small mammals.