Retinaculum may refer to:

In vertebrate anatomy:
Retinaculum,a band around tendons that holds them in place.

• Extensor retinaculum of the hand
• Flexor retinaculum of the hand
• Flexor retinaculum of foot
• Inferior extensor retinaculum of foot
• Lateral retinaculum
• Medial patellar retinaculum
• Peroneal retinacula
• Retinaculum cutis mammae, Latin name for connective breast tissue
• Superior extensor retinaculum of foot

In invertebrate anatomy:

• the retinaculum, in wing
• the Retinaculum (springtail), in springtail abdomen
• Buffetia retinaculum, a species of air-breathing land snail