Disclosed is a nuclear fuel rod (10) including at least one or more fuel pellets (11) and a cladding tube (12) surrounding the fuel pellets (11), the nuclear fuel rod (10) including at least one or more burnable absorber (13) inside the cladding tube (12), and the burnable absorber (13) including a burnable absorber material (13a) and a cladding material (13b) surrounding the burnable absorber material (13a).