Tjasse (Danish: Tjasses Gletscher) is a glacier of the King Frederick VI Coast area in the Sermersooq municipality, southeastern Greenland.

This glacier is named after Þjazi, the powerful storm giant of Norse mythology.

Tjasse is a broad glacier that flows roughly southeastward east of the smaller Ygdrasil glacier. Shortly after bending in an eastward direction it joins the right side of the Skinfaxe Glacier before its terminus in the Kattertooq fjord.

• List of glaciers in Greenland
• Rimfaxe (glacier)

• Vulnerability of Southeast Greenland Glaciers to Warm Atlantic Water From Operation IceBridge and Ocean Melting Greenland Data