This study examines the influence of school counsellor in preventing the spread of AIDs/STDs diseases among secondary school students’in Aba Education Zone of Abia State.Two research questions and two null hypotheses were formulated to guide the study.The descriptive survey design was adopted for the study.A self-restructured four-point scale questionnaire titled“Influence of School Counsellor in Preventing the Spread of AIDs/STDs Questionnaire”(ISCPSASQ)was constructed by the researcher and used to collect data for the study.Data obtained were analyzed by using descriptive inferential statistics.Mean(M)and standard deviation(SD)were used to answer the research questions while Chi-Square(x^2)was used to test the null hypotheses at 0.05 level of significance.The finding of the study revealed that counselling significantly influenced prevention and spread of AIDs/STDs among secondary school students.Based on the findings,it was recommended that accurate and timely information,methods,and materials to help the students gain the knowledge,attitude,and skills needed for realistic and appropriate sexual behavior should be made available to them.