under one's nose

(right) under (one's) (very) nose

1. In a place easy to see or find. I've been looking all over for that invitation, and it was right under my nose the whole time!
2. When one is physically present. I can't believe that one of my employees was falsifying records right under my nose.
See also: nose
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

under one's nose

Right there, in plain view, as in Your keys are on the table, right under your nose. This expression is generally a reminder that something one cannot find is actually there. [c. 1600]
See also: nose
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also:
References in classic literature ?
"The man one can't find with all one's messengers sent about the place, sitting just under one's nose, exactly where one never thought of looking!