With special reference to Secondary School student's of Chapakhowa, Sadiya , the present study titled "Examination Anxiety of class X students of Chapakhowa Town of Sadiya Sub- Division under Tinsukia District in relation to Academic Achievement, Gender, Type of Secondary Schools under SEBA and CBSE." is conducted. With the decentralization of the NCERT syllabus in SEBA schools of Assam, the SEBA, Board Examination and evaluation pattern undergo modification. This ultimately brings stress, and anxiety among students of Secondary Schools. Hence the researcher made an attempt to conduct this study. The objectives of the study are to examine the relationship between Academic Achievement and Examination Anxiety and to find significance difference between Examination Anxiety in relation to Gender, type of schools, and SEBA and CBSE. Descriptive survey method has been used to collect the data in this research. 3 schools are selected as a sample for the study by incidental sampling technique. The researcher selects 120 students as sample from the sample schools for the study. 58 Girls and 62 Boys of Secondary Schools are selected by incidental sampling method. For the purpose of data collection, a standardized 'Test Anxiety Scale' constructed and standardized by V. P. Sharma (1978) and previous years mark sheet of the participants has been used. The statistical techniques used for data analysis are Percentage, Mean, Standard Deviation, 't' test. The finding of the study shows Examination Anxiety and Academic Achievement have a definite effect and they are negatively related as the Examination anxiety. The Girls possess High Examination Anxiety as compared to Boys. The Government school student's possess High Low Examination Anxiety than Private Schools.