Tetranychus urticae Koch is a serious mite pest that attacks various agricultural crops worldwide. The present study aimed to assess the lethal effect of coconut oil against T. urticae in addition to evaluate the sublethal effects of LC15, LC30 of this oil on development and life table parameters of T. urticae. Also, the toxicity of coconut oil to the predatory mite Amblyseius swirskii Athias-Henriot was assessed in the current study. The obtained results indicated that coconut oil had acaricidal activity against T. urticae (LC50=0.843 and LC90=2.522%). The pre-adult development of T. urticae was increased by the LC15 and LC30 of coconut oil compared with the control. However, the oil treatments reduced the longevity of T. urticae females to 13.89 and 12.00 days for LC15 and LC30 treatments, respectively in compared to control (15.59 days). A total of 63.82 eggs/female were produced by control females; while LC15 and LC30 treatments decreased the total fecundity of T. urticae to 45.78 and 31.12 eggs/female, respectively. Here, the values of intrinsic rate of increase (r) in LC15 and LC30 treatments (0.212 and 0.189 day-1, respectively) were lower than that in control (0.236 day-1). The values of finite rate of increase (λ), net reproductive rate (R0), and gross reproductive rate (GRR) were reduced by coconut oil treatments, being significantly higher for control mites. On the other hand, coconut oil caused lower mortality to the predatory mite A. swirskii in compared to the pest (T. urticae). In conclusion, the present results suggested the possibility of using coconut oil in integrated pest management (IPM) programs of T. urticae.