Background: Porphyromonas gingivalis is a bacteria that is commonly found in periodontal pockets. Porphyromonas gingivalis has pathological abilities that can damage the supporting tissue of the teeth (periodontitis). Periodontal disease can be treated with mechanical therapy and antibiotics. However, antibiotic therapy can cause negative side effects. One alternative therapy that can be used is the use of natural ingredients. Honey pineapple (Ananas comosus (L.) Merr.) is a plant that has many properties, one of which is as an antibacterial Objective: To determine the potential of honey pineapple peel (Ananas comosus (L.) Merr.) from Kediri in killing Porphyromonas gingivalis bacteria which cause periodontitis. Methods: The method used in this study was solid dilution using Mueller Hinton Agar media to obtain the Minimum Bactericidal Concentration (MBC). Results: The results of the study showed the effectiveness of Kediri honey pineapple peel extract in killing Porphyromonas gingivalis bacteria with a concentration of 6.25% having an MBC value of 69.8%, a concentration of 12.5% ​​obtained an MBC value of 90.7%, and at concentrations of 25%, 50%, and 100% obtained an MBC value of 100%. Conclusion: Honey pineapple peel (Ananas comosus (L.) Merr.) from Kediri can kill Porphyromonas gingivalis bacteria maximally at concentrations of 25%, 50%, and 100%