The aim of this study is to examine the basic vertical letters based on the opinions of the primary school teachers. This qualitative research study employed phenomenology as a research method. Critical sampling and appropriate sampling methods were used in determining the participants. The participants of the study consisted of 111 classroom teachers working in primary schools in Yozgat city center. In the determination of the participants, the service life as a criterion has been determined as at least 10 years. Semi-structured interview form was used as data collection tool. The researcher has prepared a semi-structured interview form called "vertical basic writing letters writing form". Data were collected in November 2018. 111 class teachers were interviewed with semi-structured interview form. Two types of analysis technique were used for data analysis. Frequency (f) and percentage (%) were used for quantitative data analysis. Content analysis was used to analyze the qualitative data. As a result of the study, 89% of the teachers think that the capital letter A is appropriate. It is seen that 11% did not approve of the big letter A. The eligibility for capital letter I is 96%. Eligibility for capital letter J is 84%. The eligibility rate for all other capital letters is 100%. The conformity rate of lowercase letters after capital letters was examined. It is seen that the rate of conformity of the lowercase letter is 97%. Eligibility of small letter f is 62%. The rate of compliance with the letter l (lemon) is 65%. Conformity rate of small t is 81%. The compliance rate of all other lowercase letters is 100%.