Delete

Reference

Mode

Object Mode

Menu

Object ‣ Delete

ショートカットキー

X or Delete

Delete the selected objects from the current scene.

Delete Globally

Reference

Mode

Object Mode

Menu

Object ‣ Delete Globally

ショートカットキー

Shift-X or Shift-Delete

Delete the selected objects from all scenes, and any other possible usages (like e.g. from a shading node).