Pain is a disturbing sensory perception that can be treated with analgesics. Bitter leaf (Vernonia amygdalina Delile) has traditionally noun to treat pain such as toothache. This study aims to evaluate the analgesic activity of n-hexane extract of bitter leaf with 2 testing methods and determine the effective dose. The first method to test central analgesic activity is Tail Flick Test method and the second method is Writhing Test method to test peripheral analgesic activity. The test was done on mice were divided into 5 groups. The control group that was administered to CMC Na, the test group was administered n-hexane extract of bitter leaf dose 100, 200 and 400 mg/kg BW and the comparable group was administered tramadol (for Tail Flick Test method) and aspirin (for Writhing Test method). Data were analyzed by ANOVA test, followed by LSD test at 95% confidence level (p ≤ 0,05). In the Tail Flick Test method, the mice were induced by pain by heat at 50 ± 2℃ and the observed parameters were the total time required of the mice to flick the tail. The results showed that the extract at dose 400 mg/kg BW significantly prolonged the mice's flicking time compared to the control (p=0,006), but the activity was not comparable with tramadol dose of 6,5 mg/kg BW (p=0,000). In the Writhing Test method, the mice were induced by pain by acetic acid 0,6%(v/v) and the observed parameters were the total writhing of mice. The results showed that extracts with doses of 100, 200 and 400 mg/kg BW significantly decrease the total writhing of mice compared to control (p=0,000), with the effectivity percentage of 32,01%, 51,60% and 82,41% which are weaker than 65 mg/kg BW dose aspirin effectivity percentage 100%.