Which Old Testament book contains 150 chapters?

The Old Testament book containing 150 chapters is Psalms.

Psalms is a collection of religious poems, songs, and prayers traditionally associated with ancient Israel. Its 150 chapters, often called psalms, vary greatly in length and mood. They include praise, thanksgiving, lament, wisdom teaching, royal poetry, and appeals for help.

Many psalms are linked by tradition to David, but the collection also names figures such as Asaph and the sons of Korah. The book was compiled over time rather than written as one continuous work. Psalm 117 is the shortest chapter in the Bible, while Psalm 119 is the longest chapter.

A common mix-up is confusing the number of chapters with the number of individual verses or with the 150 songs in some liturgical traditions. In the Hebrew Bible, Psalms is also known as Tehillim, meaning “praises.” Its position differs between Christian Old Testament arrangements and the Jewish Tanakh, but its 150-psalm structure is widely recognized.