We present a surface-mountable miniature Fabry–Perot (FP) pressure sensor that utilizes the total internal reflection at a $\mathrm{45}\mathrm{°}$ angled fiber end face to steer the optical axis by $90°$ . By using the fiber as a waveguide, as well as a natural mask in photolithography, an FP cavity is constructed on the sidewall of the fiber. A polymer–metal composite diaphragm is employed as the pressure transducer. The sensor exhibits a good linearity over the pressure range of $1.9–14.2\mathrm{psi}$ , with a sensitivity of $0.009\mathrm{\mu m}/\mathrm{psi}$ and a hysteresis of 2.7%. This sensor is expected to impact many fronts that require reliable static pressure measurements of fluids.