Titanium nanoparticles (TiNPs) have been synthesized due to its certain characteristics that are expected like non-toxic, eco-friendly, and bioactivity. In this study, the researchers used Banana Peels Extract (BPE) with titanium dioxide to prepare new nanoparticles which are never carried before. These nanoparticles were biologically synthesized using an aqueous solution of banana peel extract as a bioreductant. The novel TiNPs were successfully prepared and characterized using Ultraviolet–Visible Spectroscopy (UV-VIS), Atomic Force Microscopy (AFM), X-Ray Diffractometer (XRD), and examined its antimicrobial activity against several pathogenic bacteria as well as insecticidal agent against Musca domestica. The instrumental analysis confirms the presence of TiNPs with average diameter: 88.45 nm and volume 31.5 nm as resulted by AFM and XRD respectively, while the bioactivity exam to TiNPs shows inhibitory effect against several pathogenic bacteria, as well as it cause a high mortality percentage against three larval stages of house fly.