B737-800 flight crew reported their aircraft was contacted by another during push back procedure.

Attributes
ACN	1279119
Time
Date	201507
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 182 Flight Crew Type 8000
Person 2
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 147
Events
Anomaly	Ground Event / Encounter Aircraft

Narrative:

Our tug driver temporarily stopped our pushback short of the normal pushback distance due to the close proximity of an aircraft that had pushed back from an adjacent gate. We soon felt a shudder and suspected that we may have been struck by the adjacent aircraft. We asked the tug driver if we had been struck and he confirmed our suspicions after conferring with a wing walker. We shut down the right engine; which had been started during pushback and were towed back into the gate.wing walkers and guides should remain in the vicinity of aircraft to clear the area before an aircraft taxis. Guides would be dismissed by flashing the taxi light upon our intent to taxi.

Original NASA ASRS Text

Title: B737-800 flight crew reported their aircraft was contacted by another during push back procedure.

Narrative: Our Tug Driver temporarily stopped our pushback short of the normal pushback distance due to the close proximity of an aircraft that had pushed back from an adjacent gate. We soon felt a shudder and suspected that we may have been struck by the adjacent aircraft. We asked the Tug Driver if we had been struck and he confirmed our suspicions after conferring with a Wing Walker. We shut down the right engine; which had been started during pushback and were towed back into the gate.Wing Walkers and Guides should remain in the vicinity of aircraft to clear the area before an aircraft taxis. Guides would be dismissed by flashing the taxi light upon our intent to taxi.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.