Abstrak: Pada umumnya, pengusaha kuliner atau ibu rumah tangga menghasilkan limbah minyak goreng dari proses penggorengan, yang dikenal sebagai "minyak jelantah", yang berarti penggunaan minyak berulang kali. Banyak orang, seperti ibu rumah tangga atau pengusaha kuliner, belum menyadari dampak buruk dari mengkonsumsi minyak yang digunakan berkali-kali dan memanfaatkannya sebelum dibuang. Tujuan dari pengabdian ini adalah untuk memberikan pelatihan tentang cara menggunakan minyak jelantah sebagai bahan utama pembuatan sabun. Responden dari kegiatan ini adalah ibu-ibu PKK salah satu desa di Lampung selatan yang berjumlah 25 orang. Responden diberi pretest terlebih dahulu. Sebelum pelatihan, pretest diberikan kepada responden untuk mengetahui sejauh mana pengetahuan mereka tentang pelatihan yang akan diberikan. Setelah pelatihan, posttest diberikan. Hasil analisis deskriptif menunjukkan bahwa pengetahuan ibu PKK meningkat setelah pelatihan, dengan nilai rata-rata pre-test sebesar 8,44% dan nilai rata-rata post-test sebesar 9,08%.Abstract: In general, culinary entrepreneurs or housewives produce waste cooking oil from the frying process, known as "oil used", which means repeated use of oil. Many people, such as housewives or culinary entrepreneurs, are not yet aware of the negative impacts of repeated use of cooking oil and utilize it before throwing it away. The purpose of this service is to provide training on how to use used cooking oil as the main ingredient in making soap. A group of PKK women in Karang Anyar Village, South Lampung, held a demonstration of making soap using used cooking oil. A total of 25 people became respondents. Respondents were given a pretest first. The purpose of this service is to provide training on the use of used cooking oil as a basic ingredient for making soap. The PKK mothers' group in Karang Anyar Village, South Lampung, conducted a demonstration of making soap using used cooking oil. A total of 25 people became respondents. Before the training, a pretest was given to respondents to find out how far their knowledge was about the training that would be given. After the training, a posttest was given. The results of the descriptive analysis showed that the knowledge of PKK mothers increased after the training, with an average pre-test value of 8.44% and an average post-test value of 9.08%.