Fibrous capsule

Attached to margins of articular surfaces

Can be divided into posterior, medial, lateral and anterior portions.

Anteriorly Replaced by quadriceps tendon-patella-ligamentum patella complex

Anterolaterally reinforced by lateral patella retinaculae

Anteromedially reinforced by medial patella retinaculae

Posteriorly reinforced by oblique and arcuate popliteal ligaments