Abstract. Indonesian squash athletes can prove that they are capable of achieving achievements. This requires abilities, not only physically and technically, but also mentally. Indonesian squash athletes are able to control and direct actions to achieve achievement, and they are able to view existing obstacles as opportunities for self-development. Mental toughness is seen as an individual's capacity to handle stress, pressure, and challenges by displaying the best abilities possessed in various situations faced. Mental Toughness has four aspects, namely control - emotion control & life control, commitment, challenge, confident - confident in abilites & confident interpersonal. The purpose of this study was to obtain data on mental toughness depictions in the Indonesia Sea Games 2019 squash athletes. The research method used was descriptive, with a population study technique of 10 respondents, namely athletes who were members of the Indonesian squash national training squash. The measuring instrument used is the result of the development of the theory of mental toughness from Peter Clough. The results of the study obtained data 7 from as many as 10 research subjects, Indonesian squash athletes all have high mental toughness scores.Keywords: Mental Toughness, Atlet Squash Indonesia, Sea Games.Abstrak. Atlet squash Indonesia dapat membuktikan bahwa mereka mampu meraih prestasi. Hal tersebut dibutuhkan kemampuan, tidak hanya secara fisik dan teknik, tetapi juga dari sisi mental. Para atlet squash Indonesia mampu mengendalikan dan mengarahkan tindakan untuk meraih prestasi, serta mereka mampu memandang hambatan yang ada sebagai peluang untuk pengembangan diri. Mental toughness dilihat sebagai kapasitas individu dalam menangani stres, tekanan, dan tantangan dengan menampilkan kemampuan terbaik yang dimiliki dalam berbagai situasi yang dihadapi. Mental Toughness memiliki empat aspek, yaitu control – emotion control & life control, commitment, challenge, confident – confident in abilites & interpersonal confident. Tujuan dalam penelitian ini ialah memperoleh data mengenai gambaran mental toughness pada atlet squash pelatnas Indonesia Sea Games 2019. Metode penelitian yang digunakan adalah deskriptif, dengan teknik studi populasi sebanyak 10 orang responden, yakni atlet yang tergabung pada pelatnas squash Indonesia. Alat ukur yang digunakan hasil pengembangan dari teori mental toughness dari Peter Clough. Hasil penelitian diperoleh data 7 dari sebanyak 10 subjek penelitian, atlet squash Indonesia seluruhnya memiliki skor mental toughness yang tinggi.Kata Kunci: Ketangguhan Mental, Atlet Squash Indonesia, Sea Games.