A 4-year old girl died Saturday when she fell from a window in her family’s fourth-floor Bronx apartment.

She had been with two relatives in the Mott Haven apartment when tragedy struck at 4:55 p.m.

The youngster went into another room where she climbed to the top half of an open window and lost her balance.

The girl, identified by police as Helena Flores, toppled to the ground outside 685 East 140 Street.