Pergularia tomentosa is a medicinal plant mainly found in Saudi Arabia, northern and southern Africa. In this study, we present the sequence of the complete chloroplast (cp) genome of P. tomentosa in order to evaluate the evolutionary relationship in the subfamily Asclepiadoideae. The cp is 164,213 bp in lengh with 37.3% GC content, inverted repeat (IR) regions of 21,411 bp each, a large single-copy (LSC) region of 80,102 bp, and a small single-copy (SSC) region of 17,022 bp. It constitutes of 89 protien-coding genes, 44 tRNA genes, and 8 rRNA genes. The phylogenetic relationship showed close relationship between P. tomentosa and other Asclepiadeae members with Marsedineae subtribe. The study will help for future research on evolutionary studies of Apoceanaceae.