The present invention provides a composition for a gel polymer electrolyte including i) an electrolyte solvent, ii) an ionizable lithium salt, iii) a polymerization initiator, and iv) a monomer containing a functional group capable of combining with metal ions; and a lithium secondary battery including the same. When applying the composition for a gel polymer electrolyte according to the present invention in a lithium secondary battery, the migration of metal ions eluted from a positive electrode to a negative electrode may be prevented, or the precipitation of a metal at the negative electrode may be decreased. Thus, the life of the battery may be increased, and capacity properties of the battery may be excellent despite being charged by not only a common voltage but a high voltage.