The study aims was to describe the relationship between students’creativity and cognitive learning outcome through the implementation of Project Based Learning (PjBL) on the biology of Fungi matter. Researchers use a correlational method of sampling as many as 25 students in 10th grade being chosen by purposive sampling technique. The instruments used to collect creativity data are assessments of products referred to the creativity indicator as: (1) fluency, (2) flexibility and (3) novelty, while students' cognitive learning outcome data are 20 multiple-choice, 4 open-ended essay based on taxonomy Bloom's revision from C1 to C6. Data analysis uses a statistic descriptive to know average and deviating standards of creativity and students' cognitive learning outcome, while to know the level of relationship between variables used non-parametric statistics through spearman's correlation test. The result shows that the average score of students' creativity in creating applied products relating to the function and role of fungi is 55.5 while the average results of students' cognitive learning outcome are 68.24. There is a middle correlation between creativity and students' cognitive learning outcome (r= 0.413).