Lithraea molleoides is a forest species native to Brazil that uses wood, tannery, medicinal purposes, energy and restoration programs. Its propagation occurs in the seminal form, presenting irregular, uneven germination and with a wide range of distribution over time. The objective of this work was verify the efficiency of the association between mechanical and thermal scarification to overcome dormancy of L. molleoides seeds. The experimental design was a completely randomized design consisting in a factorial scheme (4 x 3) with four (0, 2, 4 and 6 minutes), and three forms of seed immersion in water (0, 24 h, 24 h / 70 ºC) with four replications. The germination speed index, germination speed coefficient, mean germination time, first germination count, accumulated percentages of germination and firm / dead seeds were determined. The results showed that seeds of L. molleoides scarified with sandpaper in the time of 4 minutes and immersed for 24 hours in water at 70 ºC expressed satisfactory results in overcoming the integumentary dormancy. The association between mechanical and thermal scarification is efficient to overcome the integumentary dormancy of L. molleoides seeds. The scarification time of 4 minutes with sandpaper in a rotating cylinder followed by immersion in water at 70 ºC until total cooling for 24 hours is recommended to overcome dormancy of L. molleoides seeds.