PROTECTING DEVICE AND BATTERY PACK

Provided are a protecting device and a battery pack capable of preventing floating of a blowout member, preventing deformation of a meltable conductor, and maintaining predetermined current capacity and blowout properties. The protecting device includes: a meltable conductor ; and a blowout member connected to one surface of the meltable conductor , wherein the blowout member includes: an insulating substrate ; and a deformation suppressing electrode formed on a front surface connected to the meltable conductor of the insulating substrate and connected to the meltable conductor to suppress deformation of the meltable conductor