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In philosophy and certain models of psychology, qualia (/ˈkwɑːliə/ or /ˈkwliə/; singular form: quale) are defined as individual instances of subjective, conscious experience. The term qualia derives from the Latin neuter plural form (qualia) of the Latin adjective quālis (Latin pronunciation: [ˈkʷaːlɪs]) meaning "of what sort" or "of what kind" in a specific instance, such as "what it is like to taste a specific apple, this particular apple now".

Examples of qualia include the perceived sensation of pain of a headache, the taste of wine, as well as the redness of an evening sky. As qualitative characters of sensation, qualia stand in contrast to "propositional attitudes", where the focus is on beliefs about experience rather than what it is directly like to be experiencing.

Philosopher and cognitive scientist Daniel Dennett once suggested that qualia was "an unfamiliar term for something that could not be more familiar to each of us: the ways things seem to us".

Much of the debate over their importance hinges on the definition of the term, and various philosophers emphasize or deny the existence of certain features of qualia. Consequently, the nature and existence of various definitions of qualia remain controversial because they are not verifiable.

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