In the present research, coaxial electrospinning method was employed to encapsulate healing agents in the core-shell nanofibers. The nanofibers containing healing agents were incorporated between the carbon layers in carbon fiber/epoxy composite panels to imbue them with a self-healing ability. Three types of polymers polyacrylonitrile (PAN), Poly(methyl methacrylate) (PMMA), and Styrene-co-acrylonitrile (SAN) were used as shell materials of the nanofibers in order to investigate effect of shell material on mechanical properties o and healing beauvoir of the hybrid composites. Morphological studies of the fabricated nanofibers by field emission scanning electron microscope (FESEM) confirmed that the nanofibers were fabricated without any signs of beads. The average diameters of the nanofibers with PAN, PMMA, and SAN shell and epoxy core were determined to be 483, 357, and 750 nm, respectively. In addition, for amine-based curing agent the nanofibers diameters were measured 406, 344, and 670 nm respectively for PAN, PMMA and SAN shell. Investigating, fabricated nanofibers structure using transmission electron microscopy (TEM) revealed that core-shell structures were formed for all the shells and healing agents. Extraction and thermogravimetric analysis (TGA) results confirmed the presence of two components in the core-shell nanofibers. Furthermore, these two analyses showed that the core content for epoxy as core in PAN, PMMA, and SAN as shell were 24, 27, and 40%, respectively. Meanwhile, the core content for amine based curing agent in PAN, PMMA, and SAN shell were measured 37, 30, and 43%, respectively. Tensile, short beam shear, three-point bending, and Izod impact tests were employed to investigate effect of incorporation core-shell nanofibers on mechanical properties of the carbon/epoxy composites. Tensile results showed that incorporation the nanofibers with PAN, PMMA, and SAN shell led to 11, 6, and 8% in tensile strength improvement, respectively. Furthermore, incorporation aforementioned nanofibers caused in 19, 26, and 8% increase in short beam shear strength of the hybrid composites, respectively. Results confirmed that embedding nanofibers did not significant effect on Izod impact adsorbs ion energy of the hybrid composites. Mechanical test results showed that the nanofiber tensile strength has the most effect on in-plane mechanical properties of the hybrid composite meanwhile the the nanofiber diameter has the most effect on out-of-plane properties of the hybrid composites. The three-point bending tests were employed to investigate healing behavior of the composite containing core-shell nanofibers. The results showed the hybrid composites containing core-shell nanofiber with PAN, PMMA, and SAN shell were able to recover its initial mechanical properties up 2, 4, and 3 times respectively. Furthermore, the results confirm that the nanofiber shell has influence on fracture behavior and releasing of healing agents.