Rectus muscle (Latin: , "straight muscle") may refer to:

In the trunk: Rectus abdominis muscle

In the eye: Inferior rectus muscle Lateral rectus muscle Medial rectus muscle Superior rectus muscle

In the leg: Rectus femoris muscle

In the neck: Rectus capitis anterior muscle Rectus capitis lateralis muscle Rectus capitis posterior major muscle Rectus capitis posterior minor