Self-importance

n.

1.

An exaggerated estimate of one's own importance or merit, esp. as manifested by the conduct or manners; self-conceit.

Noun	1.	self-importance - an inflated feeling of pride in your superiority to others Synonyms: ego, egotism
	2.	self-importance - an exaggerated opinion of your own importance Synonyms: egotism, swelled head

ego, egotism, pride, pridefulness