The study was conducted to determine if Vachellia tortilis leaf meal inclusion affect the adaptation periods in finishing pigs. A total of 48 clinically healthy male Large White × Landrace male pigs with a mean (± SD) body weight of 63.8 ± 3.28 kg aged 14 weeks were used. Pigs were assigned to individual pens in a completely randomized design and allotted to each of six experimental diets which contained 0, 30, 60, 90, 120 and 150 g/kg DM of V. tortilis leaf meal. The adaptation period was measured daily while average daily feed intake (ADFI) and average daily gain (ADG) were calculated weekly with gain: feed ratio (G: F) of pigs. Regression analyses was used to analyse the data. There was a quadratic decrease (P < 0.001) in ADFI, while ADG increased linearly (P < 0.001) with incremental level of V. tortilis leaf meal. Incremental level of V. tortilis leaf meal increased G: F ratio quadratically (P < 0.001). A linear increase in adaptation period was observed (P < 0.05) with increasing inclusion level of V. tortilis leaf meal. As the leaf meal inclusion increased by 1 g/kg DM, the adaptation period increased by 0.027 days. Variation of feed intake, expressed as a coefficient of variation of feed intake, increased linearly (P < 0.05) with increasing inclusion level of V. tortilis leaf meal. Adaptation period of finishing pigs is influenced by the inclusion level of V. tortilis leaf meal diets, by causing a positive linear relationship, therefore pigs fed increasing levels of V. tortilis leaf meal diets required more time to adapt.