diff --git a/Code/Game/GameClient/GameClientState/Camera_FPSV2.cpp b/Code/Game/GameClient/GameClientState/Camera_FPSV2.cpp
index 3af0cae5..f2f3c1ad 100644
--- a/Code/Game/GameClient/GameClientState/Camera_FPSV2.cpp
+++ b/Code/Game/GameClient/GameClientState/Camera_FPSV2.cpp
@@ -10,6 +10,7 @@ Camera_FPSV2::Camera_FPSV2()
 	this->headOffset =
 	this->body.translation = Float3::null;
 	this->body.rotation = Quaternion::identity;
+	this->pitchHaveChanged = false;
 }
 
 Camera_FPSV2::~Camera_FPSV2() {}
@@ -21,6 +22,7 @@ Camera_FPSV2 & Camera_FPSV2::operator = ( const Camera_FPSV2 &camera )
 	this->headOffset = camera.headOffset;
 	this->body.translation = camera.body.translation;
 	this->body.rotation = camera.body.rotation;
+	this->pitchHaveChanged = camera.pitchHaveChanged;
 	return *this;
 }
 
@@ -45,6 +47,7 @@ void Camera_FPSV2::SetRotation( const Quaternion &rotation )
 
 	this->body.rotation = rotation;
 	this->head.SetRotation( rotation * Rotation(this->pitchUp, WorldAxisOf(rotation, Float3::standard_unit_x) ) );
+	this->pitchHaveChanged = false;
 }
 
 void Camera_FPSV2::SetAngular( const Float3 &axis )
@@ -69,6 +72,12 @@ void Camera_FPSV2::SetPerspectiveProjection( Float verticalFoV, Float aspectRati
 
 void Camera_FPSV2::UpdateOrientation()
 {
+	if( this->pitchHaveChanged )
+	{
+		this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+		this->pitchHaveChanged = false;
+	}
+
 	Float4x4 orientation;
 	OrientationMatrix( this->body.rotation, this->body.translation, orientation );
 
@@ -78,7 +87,8 @@ void Camera_FPSV2::UpdateOrientation()
 void Camera_FPSV2::SnapUpToNormal( const Float3 &normal )
 {
 	this->body.rotation = Rotation( SnapAngularAxis(AngularAxis(this->body.rotation), WorldAxisOf(this->body.rotation, Float3::standard_unit_y), normal) );
-	this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp * Float3::standard_unit_x) );
+	this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+	this->pitchHaveChanged = false;
 }
 
 void Camera_FPSV2::Move( const Float3 &deltaPosition )
@@ -89,8 +99,8 @@ void Camera_FPSV2::Move( const Float3 &deltaPosition )
 
 void Camera_FPSV2::Rotate( const Quaternion &deltaRotation )
 {
-	this->head.Rotate( deltaRotation );
 	this->body.rotation *= deltaRotation;
+	this->pitchHaveChanged = true;
 }
 
 void Camera_FPSV2::Rotate( const Float3 &deltaAngularAxis )
@@ -121,7 +131,7 @@ void Camera_FPSV2::StrafeLeft( Float distance )
 void Camera_FPSV2::PitchUp( Float radian )
 {
 	this->pitchUp = Clamp( this->pitchUp + radian, -0.48f * pi, 0.48f * pi );
-//	this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, Float3::standard_unit_x) );
+	this->pitchHaveChanged = true;
 }
 
 void Camera_FPSV2::PitchDown( Float radian )
@@ -152,6 +162,12 @@ const Float3 & Camera_FPSV2::GetPosition() const
 
 Float4x4 & Camera_FPSV2::GetViewMatrix( Float4x4 &targetMem ) const
 {
+	if( this->pitchHaveChanged )
+	{
+		this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+		this->pitchHaveChanged = false;
+	}
+
 	return this->head.GetViewMatrix( targetMem );
 }
 
@@ -162,11 +178,23 @@ const Float4x4 & Camera_FPSV2::GetProjectionMatrix() const
 
 Float4x4 & Camera_FPSV2::GetViewsProjMatrix( Float4x4 &targetMem ) const
 {
+	if( this->pitchHaveChanged )
+	{
+		this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+		this->pitchHaveChanged = false;
+	}
+
 	return this->head.GetViewsProjMatrix( targetMem );
 }
 
 Float3 Camera_FPSV2::GetNormalOf( const Float3 &axis ) const
 {
+	if( this->pitchHaveChanged )
+	{
+		this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+		this->pitchHaveChanged = false;
+	}
+
 	return this->head.GetNormalOf( axis );
 }
 
@@ -182,6 +210,12 @@ Float3 Camera_FPSV2::GetUp() const
 
 Float3 Camera_FPSV2::GetLook() const
 {
+	if( this->pitchHaveChanged )
+	{
+		this->head.SetRotation( this->body.rotation * Rotation(this->pitchUp, WorldAxisOf(this->body.rotation, Float3::standard_unit_x) ) );
+		this->pitchHaveChanged = false;
+	}
+
 	return this->head.GetNormalOf( -Float3::standard_unit_z );
 }
 
diff --git a/Code/Game/GameClient/GameClientState/Camera_FPSV2.h b/Code/Game/GameClient/GameClientState/Camera_FPSV2.h
index 7f66b185..210c9707 100644
--- a/Code/Game/GameClient/GameClientState/Camera_FPSV2.h
+++ b/Code/Game/GameClient/GameClientState/Camera_FPSV2.h
@@ -50,7 +50,7 @@ public:
 		  ::Oyster::Math::Float3	   GetForward() const;
 
 private:
-	Camera_BasicV2 head;
+	mutable Camera_BasicV2 head;
 	::Oyster::Math::Float pitchUp;
 	::Oyster::Math::Float3 headOffset;
 	struct
@@ -58,6 +58,7 @@ private:
 		::Oyster::Math::Float3 translation;
 		::Oyster::Math::Quaternion rotation;
 	} body;
+	mutable bool pitchHaveChanged;
 };
 
 #endif
\ No newline at end of file