To provide a holding sealing material which can suppress increase in organic component in exhaust gas when the holding sealing material is exposed to a high temperature within an exhaust gas purification device, which requires a small number of man hours for manufacturing, and which can prevent mats to be laminated from being erroneously combined.

The holding sealing material is composed of one mat containing inorganic fibers. The mat comprises a first mat having a first side surface, and a second mat having a second side surface, and a part of the first side surface and a part of the second side surface are continuously bendably connected to each other.