This study aims to analyze the relationship between peer pressure and the English-speaking performance of eighth-grade students at SMPN 01 Abung Timur in the 2024/2025 academic year. The background of this research is based on the low participation of students in English-speaking activities, which is influenced by fear of making mistakes, anxiety, and social pressure from peers. This study employed a descriptive quantitative method with a saturated sampling technique, involving 57 students as respondents. The research instruments consisted of a peer pressure questionnaire and an English-speaking performance test. Data were analyzed using normality tests, homogeneity tests, Pearson product-moment correlation, and simple linear regression. The results showed a significant relationship between peer pressure and English-speaking performance (t observed = 1.99 > t table = 1.67, α = 0.05). The correlation coefficient r = 0.26 indicates a very low positive relationship, with peer pressure contributing only 6.7% (R² = 0.067), while 93.3% was influenced by other factors. The simple regression equation obtained was Y = 42.80 + 0.187X. These findings are also linked to the cultural context of Lampung, where the value of pi’il pesenggiri emphasizes dignity and self-respect in social interactions. For some students, negative pressure such as ridicule or criticism may be perceived as a threat to pi’il, thereby triggering a stronger motivation to prove themselves and avoid losing honor in front of their peers. Thus, this study concludes that peer pressure has a significant yet small effect on students’ speaking performance, and this influence is shaped by the local cultural value of pi’il pesenggiri, which guides students’ attitudes and behaviors.