spiral notebook
US /ˈspaɪ.rəl ˈnoʊt.bʊk/
UK /ˈspaɪ.rəl ˈnoʊt.bʊk/

1.
a notebook whose pages are held together by a spiral of wire passing through holes along one edge
:
•
She jotted down notes in her spiral notebook during the lecture.
•
I prefer a spiral notebook because it lays flat when open.