AS350 pilot reported an near midair collision departing an airport.

Attributes
ACN	1341311
Time
Date	201603
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Eurocopter AS 350/355/EC130 - Astar/Twinstar/Ecureuil
Operating Under FAR Part	Part 135
Flight Phase	Takeoff
Route In Use	Direct
Flight Plan	VFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Initial Climb
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Instrument
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 4830 Flight Crew Type 4830
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 400 Vertical 400

Narrative:

[I] called for a departure from present position departure to the east. Traffic responded on a 7 mile final for runway xx. I started a takeoff on a 090 heading. At about 200 feet AGL the flight nurse started to say plane; and right then I saw the airplane taking off from runway yy. I made a rapid right turn to avoid the airplane who had made no radio calls at all up to this point or after the incident. I confirmed this with the FBO and fellow pilots; and made sure that everyone heard my radio call.

Original NASA ASRS Text

Title: AS350 pilot reported an NMAC departing an airport.

Narrative: [I] called for a departure from present position departure to the east. Traffic responded on a 7 mile final for Runway XX. I started a takeoff on a 090 heading. At about 200 feet AGL the flight nurse started to say plane; and right then I saw the airplane taking off from Runway YY. I made a rapid right turn to avoid the airplane who had made no radio calls at all up to this point or after the incident. I confirmed this with the FBO and fellow pilots; and made sure that everyone heard my radio call.

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.