To provide a protecting element which can eliminate the migration of low melting point alloy and reliably prevent units under DC from overcurrent.

The protecting element has a pair of needle electrodes 1 and 1. A guide shaft 6 is arranged in parallel with the needle electrodes 1 and 1. An overcurrent heating sheet 2 heated by overcurrent energization is transversely bridged between the pair of needle electrodes 1 and 1 while being inserted into the guide shaft 80a. A low-melting point fusible material 3 joints the needle electrodes 1 and 1 and the overcurrent heating sheet 2, and the guide shaft 6 and the overcurrent heating sheet 2. A spring 7 is disposed that retains stress energy to separate the current heating sheet 2 from the needle electrodes 1 and 1.