Maintenance may refer to:

• Maintenance of an organism
• Maintenance respiration

• Alimony, also called maintenance in British English
• Champerty and maintenance, two related legal doctrines
• Child support, also commonly called "child maintenance"
• Feudal maintenance, system of funding armies

• Maintenance (technical)
• Aircraft maintenance
• Bicycle maintenance
• Bus maintenance
• Car maintenance
• Train maintenance
• Property maintenance
• Railroad track maintenance
• Software maintenance

• Condition-based maintenance
• Corrective maintenance
• Planned maintenance
• Predictive maintenance
• Preventive maintenance
• Total productive maintenance