In this paper, COMSOL environment was used to study plasmonic photonic crystal fiber sensor. This environment is based on finite element methods. The proposed sensor for determining the concentration of glucose in the blood contains many geometrical parameters, some of which were focused on, which achieve important changes in the properties of the sensor. Three of the sensor parameters were studied using the range (0-60)g/L of glucose concentrations. The results showed the possibility of multiple resonant loss peaks with the change of wavelength. Accordingly, we have achieved several possibilities for the chosen design based on the higher values of sensitivity, the lower values of the resolution, and the stability of both values for all the used glucose concentrations. Generally, the proposed sensor achieved a stable sensitivity 5000nm/RIU and resolution 6 2 10 RIU

Photonic Crystal Fiber, Glucose Concentration, Sensitivity.