For establishing an accurate target for rehabilitation of patellar alta and baja, it is necessary to determine whether there is a correlation between the patellar height and knee joint muscle strength and muscle tone and knee joint range of motion (ROM). Aim: The purpose of this study was to confirm the correlation between patellar height and quadriceps muscle strength and muscle tone and knee joint ROM. Method: This study included 34 subjects. Their patellar length, patellar tendon length, quadriceps muscle strength and muscle tone, and knee joint ROM were measured. Results: The results showed that there was significant correlation between patellar length and quadriceps muscle strength and between the patellar tendon length and quadriceps muscle strength. The patellar length and patellar tendon length were also highly correlated with rectus femoris stiffness. Conclusions: This suggested that patellar length and patellar tendon length are related with knee extensor muscle strength and muscle tone. In addition, factors including strength and tone of the knee extensor muscles can be considered in the treatment of abnormal patella height.