The purpose of this study are (1) To find out the students' speaking skill before being taught by using task-based instruction. (2) To know the students' speaking skill after being taught by using task-based instruction. (3) To discover the significant difference on the students' speaking skill taught by using task-based instruction and without task-based instruction. To complete her writing , she did two kinds of research, library research and field research. She took the first years students of SMK Texmaco Semarang as her population and sample. In this case, she used random sampling. She took 36 students of two classes from total population. In this case, she conducted an observation to the student respondents, then she analyzed the data which she got during the observation. Finally, she presents the result of her analysis in a conclusion. Teaching speaking by using task-based instruction is an interesting way to do by the teacher to reach better target of students' speaking skill. Teaching speaking by using task-based instruction has many advantages, such as : it can enrich students' speaking skill, it can make teaching learning process becomes more comfortable, it can also help the students to speak English correctly. Beside advantages for students, it also brings advantage for the teacher in teaching the speaking skill target because the students feel relaxed in accepting the lessons for using and speaking English words used for speaking lesson. It can be implemented by using task-based instruction technique as teahing instrument, for example using it as the helping tools to the students to use, speak and respond by using English correctly. Finally, the writer suggests that the English teacher should master the speaking skills and its techniques, so that he or she will not find any difficulties in teaching speaking using pictures techniques, he or she should prepare well the equipments that will be used in teaching speaking process. He or she should manage the class well so that the students will not make some noise in the class.