This research had three objectives to study motivational factors, 	the level of teacher academic performance and motivational factors affecting to academic performance of teachers in Phrapariyattitham General Education  Schools of 12th  group.
  	The population groups for this researches were 117 teachers and officials from 12  Phrapariyattitham General Education Schools of 12th group.  Instrument used for collecting data was fivescale questionnaire. Frequency, percentage, means, standard deviation, and Stepwise Multiple Regression Analysis were enployed for  data  analysis.
The  results  of  this  research  were  found  as follows;
	1)  Motivational  factors  in  academic  performance  of  teachers  in  Phrapariyattitham General  Education  Schools  of  12th   group  were  totally  on  medium  level.
              2)  The  level  of  academic  performance for teachers  in  Phrapariyattitham Gemeal Education  Schools  of  12th group  was  totally  on  medium  level.
3)  The  relationship  between  motivational factors  and  academic  performance  of  teachers  in  Phrapariyattitham General Education  Schools  of  12th  group  were found  highly  relationship. which  can  be  written by  predictive  equations  in  regression  form  as;   	
Y=344 + .454(X10) + .279 (X7)+ 176(X9)
