The present invention relates to a connector for battery packs, the connector including a housing to which a terminal pin configured to serve as an electrical connection path is mounted, wherein the housing includes a lower end portion to which the terminal pin is coupled and a main body portion having a partition wall portion configured to prevent deformation of the terminal pin when an external terminal is coupled, the lower end portion being mounted to the main body portion, and the lower end portion and the main body portion are made of different materials. Melting of the connector for battery packs is prevented, whereby spread of a thermal runaway phenomenon occurring in a battery pack to the outside is prevented.